Luminosity

“ When the woman awoke it was to find herself in the depths of a moonless and starless night. A heavy unbroken crust of cloud stretched across the sky, shutting out every speck of heaven; and a distant halo which hung over the town of Casterbridge was visible against the black concave, the luminosity appearing the brighter by its great contrast with the circumscribing darkness. ”

“ To the human eye there appears in space a luminous sphere that in its appointed path goes on unceasingly. The wise men are not agreed whether this apparition is merely of gaseous composition or is a solid body supplied extraneously with heat and luminosity, inexhaustibly ”

“ In spite of this the tints may not match, one of them being much brighter than the other, containing, say, twice as much red light and twice as much white light; having, in other words, twice as great brightness or luminosity. The only mode of causing the tints to match will be to expose the darker-colored surface to a stronger light, or the brighter surface to one that is feebler. It is evident, then, that brightness or luminosity is one of the properties by which we can* define color; it is our second color-constant. ”

“ One of the most noticeable things about colors is their difference in intensity. Colors are intense when they excel both in purity and brightness; for it is quite evident that, however pure the colored light may be, it still will produce very little effect on the eye if its total quantity be small; and, on the other hand, it is plain that its action on the same organ will not be considerable if it is diluted with much white light. Purity and brightness, or luminosity, are, then, the factors on which intensity depends. ”

“ The sun is the great lamp that illuminates the world, while the atmosphere, which is filled with particles of various substances, becomes the shade of the lamp which diffuses and softens the light and gives it its color tones, whether of warmth or coldness. We could not well do without the reflected light of the sky. The poetry of life would be sadly marred. The beautiful effects of color and purity of tone would be wanting. We need to bathe in light as much as in water, and the character of the light is almost as important as the character of the water. ”

“ The sun shines and dispels the darkness, and makes it light. And do you know that the moon does not shine by its own light, but it simply throws back again, as we say, reflects, the light of the sun, just the same as when a boy takes a small piece or looking-glass and throws the light across the street? There is no light in the looking-glass itself, but it simply takes the rays of light which fall upon it from the sun and bends them, or turns them, so that the boy can throw the rays of light across the street, or upon anything that he desires that is in range of him. ”

“ Shafts of light seemed to dart in rapid succession from earth to sky, until at last the vast luminous orb of day rose from the depth of the many-coloured radiance, and with its surpassing glory put everything else to shame. ”

“ But he unwrapped each covering himself, and when the last dazzling wrapper was revealed, no human being durst gaze upon that Light. But he who was born of Light looked upon what was hidden in that covering and flung all up through the smoke-hole to take its place in the Firmament of Heaven, where it shines like unto a Sun—to-day, as in those days. And it was given the world to shed its rays of Light upon the earth by day, even as the Moon shines for Light by night, and the Stars sing for joy and gladness that Light came to the world. ”

“ When daylight has merged into twilight, and twilight has deepened into darkness, myriads of shining points dot the vast expanse of the night sky, and you have been taught that these shining points are the Lamps illumining the abode of your Gods and Goddesses, whom you have regarded as the Messengers of Andûmana̤ the Supreme One. Among those shining points is one gleaming with a soft, silvery radiance, which your Priests have named Inglos ēvecto Fryda̤, which, I am told, would in my language mean Fryda̤'s lamp or light. Truly this silvery point is the Earth world where I dwell. ”

“ That which before lay buried in the shade of night is itself now a radiator of the luminous fluid. Mark the genial warmth that comes as the sister of light; then stand by the side of the experimentalist and watch the point on which he directs the shining focus, and in an instant see iron melt and stones run like water, under the fervent heat! Now look upward to the heavens, where the falling drops of rain have formed a natural prism in the rainbow, and shown that the beam of pure whiteness, refracted into various rays, glows with all the tints that adorn the garden of nature. ”

“ Nothing dispelled that darkness but the dim starlight from above, but now, as we gazed forth, we became aware of a faint light coming feebly toward us from far ahead, a faint light that seemed like a great, feebly-glowing cloud in the darkness, and that was intensifying in radiance with each moment that we rushed toward it. ”

“ We are trying to get a conception of the great orb of the sun from the little ray of light that peeps through our own closed shutters. True, that ray of light is of the same nature as the splendor of the noon day and bears on its face the story of its origin and of the qualities of its source, but to know the warmth and radiance of the sun we must open wide our blinds and let the glory in. With the affirmation that God is the one we boldly take our stand on the Divine plane and illumine our own personality with the effulgence from the Radiant Center of the Absolute. ”

“ And there was Light.’ From that ‘Light,’ the effulgence of God’s own Actual Presence and Intelligence, came the Movement which dispelled ‘darkness.’ Movement, once begun, shaped all that which before was ‘without form’ and filled all that had been ‘void.’ Light is the positive exhalation and pulsation of the Divine Existence—the Active Personality of an Eternal God;—Light, which enters the soul and builds the body of every living organism,—therefore Light is Life. ”

“ The light of the sun is made up of seven colours, though God has so perfectly blended them that we see only white light; but all these colours may be traced in the seven-coloured arch, which is a token to men of His mercy, and a sign that while the earth remains "seed-time and harvest, cold and heat, summer and winter, day and night, shall not cease."
The smallest portion of light which we can speak of is called a ray of light. ”

“ In the formation of light, and the beneficent effects it produces, the wisdom and goodness of the Almighty are conspicuously displayed. Without the beams of the sun and the influence of light, what were all the realms of this world, but an undistinguished chaos and so many dungeons of darkness? ”

“ As the astronomer sees in the sun a more glorious object than the sun of the poet, recognising in imagination not only the visible splendour of that orb, but the mighty energy with which it is swaying the motions of a scheme of circling worlds, the wondrous activities at work throughout its entire frame, the inconceivable tumult which must prevail in that seemingly silent globe, so the glories of light, rightly understood, are far more impressive than as they appeal simply to the senses. ”

“ The colours of the stars,—not only those
That burn in heaven, but those that long since perished,
Those vanished suns that eyes can still behold,
The strange lost stars whose light still reaches earth
Although they died ten thousand years ago.
Here, night by night, the innumerable heavens
Speak to an eye more sensitive than man's,
Write on the camera's delicate retina
A thousand messages, lines of dark and bright
That speak of elements unknown on earth. ”

“ Were we from the darkness of night at once exposed to the luminous rays of the Sun, it would dazzle our eyes and render them unfit to distinguish a single object.—It is only by a gradual transition from darkness to light that we are able to accustom our eyes to the brilliancy of noon. ”

“ Thirdly, in the Night-time the Eye being placed in the shadow of the Earth, those reflexions of a Star will be yet more easily visible; whenas the great light of the Sun by Day must needs much debilitate these reflected Images of the Objects upon the Earth, his beams striking our Eyes with so strong vibrations. ”

“ The clouds, so long as the sun is above the horizon, intercept much of the light and colour; but, when the great luminary has passed away from our direct vision, his light shines more directly on the under sides of all the clouds and air strata of different densities; a new and more brilliant light flushes the western sky, and a display of gorgeous ever-changing tints occurs which are at once the delight of the beholder and the despair of the artist. And all this unsurpassable glory we owe to—dust! ”

“ A dark cloud, like another sky, covered the entire cope of heaven,—but in this place it thinned away, and white stains of light showed a half eclipsed star behind it,—in that place it was rent asunder, and a star passed across the opening in all its brightness, and then vanished. ”

“ He had never seen anything in his life so bright as that golden bough that hung over him, and when he gazed through it, he saw that the sky was bluer than he had ever imagined that it could be, and that everything at which he looked had not only this quality of intense, of penetrating brightness, but appeared transparent, with a luminous transparency which seemed a veil spread over something that was shining beyond it. ”

“ However, out of the cloud comes lightning--from the depths of night bursts forth the sun; all bright things are preceded by darkness; and the shadow that is upon me may give place to light. Even here, perhaps, I may be enabled to do more for the cause I have undertaken than if I had reached France. ”

“ Instead of remaining fixed in sad contemplation of this short final moment when the radiant orb goes suddenly down below the horizon in storm and cloud, let us keep steadily in view the light as, serene in its far-reaching radiance, it illuminated the world for eighty splendid years. ”

“ Light, which embellishes with so much magnificence a pure and serene sky, by means of innumerable bright starry orbs which are spread over it, sometimes, in a dark and cloudy sky, exhibits an ornament which, by its pomp, splendour and variety of colours, attracts the attention of every eye that has an opportunity of beholding it. ”

“ In one word, the sphere of darkness in which I floated seemed to be filled with points of light, while the absolute blackness that surrounded them, the absence of the slightest radiation, or illumination of space at large, was strange beyond expression to an eye accustomed to that diffusion of light which is produced by the atmosphere. ”

“ Twilight is brief in this latitude, Night, clad in her sombre garb, following close upon the footsteps of the Day, while a soft roseate light ushers in the myriads of heavenly lamps, tremulous and luminous in their varying colors. "A fiery sunset burns itself out quickly," says the Italian proverb. Though the twilight is brief, the afterglow is often very beautiful, almost rivaling the sunset itself. ”

“ The light grows, little by little, until at length the radiant star reappears in all its primitive brightness. The fine days, the glorious light returns, until the moment when the same fading recommences and the darkness sets in once more. ”

“ To do this the student must find the lightest light and darkest dark in the subject before him and, having found it, adhere to it to the end of his work. For as the sun dominates the sky and earth so do its rays dominate parts of the whole, making more luminous than the rest only one object upon which its light falls. ”

“ When I awake, the morning-star hangs low in the heavens like a great lamp, its light an infinitely pure and serene radiance with no suggestion of heat or combustion, made to appeal to some higher vision. ”

“ On their homeward tour, one of the finest phenomena in nature may, perchance, appear to them. A streak of light, suddenly appearing on the horizon, shoots like lightning up to the sky. One moment longer, and the whole sky is covered by such streaks, all of different colors amalgamating together, and constantly changing and lighting up the objects as bright as daylight. ”

“ Soft gleams of light shot from the horizon upward, the dark-blue heavens assumed a lighter tint, the pencilled rays growing broader and fusing together, producing a strange and rapidly-spreading nebulous light. ”

“ As day imperceptibly fades away it is not black darkness that succeeds, but a light that enables us to see farther, a mellower light that enables us to see the Universe at large. From this earthly life we are transported to a higher, intenser, ampler life among the stars. ”

“ What a strange and curious radiance—like that of "a dome of many-coloured glass"—must be shed upon a planet by its red and green or yellow and blue suns! What striking contrasts, what fairylike changes, must be produced by a red day and a green day succeeding alternately to a white day, or a day of darkness! ”

“ Every one knows the changed aspect of the whole material world, when one of the lights that radiated the inner self has merged into shadow, leaving us to grope our way in darkness, until the radiance of a new light, emerging from ourselves, shall penetrate the shadow and shine with the combined brightness of both. ”

“ When the great source of daylight disappears he must make light for himself, for the sources of night-light—the moon and stars and aurora borealis and lightning—are not sufficient to satisfy his wants. In this chapter we shall follow man in his efforts to conquer darkness, and we shall have the story of the lamp. ”

“ Even the wintry sky borrowed, for an hour, the spectral aspect of the earth, and the familiar shapes of cloud, as of hill, stood out with all the majesty of uncovered laws—stripped of the mere frivolous effect of light or shade. ”

“ He commanded that the rays of light should penetrate the awful darkness, and there should alternately be night and day. The sun to shine by day and the moon to shine by night, to break the awful stillness of this once dark and cheerless world. ”