Robert Louis Stevenson

“ I screamed, and "O God!" again and again; for there before my eyes—pale and shaken, and half fainting, and groping before him with his hands, like a man restored from death—there stood Henry Jekyll!
What he told me in the next hour, I cannot bring my mind to set on paper. I saw what I saw, I heard what I heard, and my soul sickened at it; and yet now when that sight has faded from my eyes, I ask myself if I believe it, and I cannot answer. My life is shaken to its roots; sleep has left me; the deadliest terror sits by me at all hours of the day and night ”

“ But I have gone too far in the way of inexplicable services to pause before I see the end."
"It is well," replied my visitor. "Lanyon, you remember your vows: what follows is under the seal of our profession. [6] And now, you who have so long been bound to the most narrow and material views, you who have denied the virtue of transcendental medicine, [7] you who have derided your superiors—behold!"
He put the glass to his lips and drank at one gulp. A cry followed; he reeled, staggered, clutched at the table and held on, staring with injected eyes, [8] gasping with open mouth ”

“ As you decide, you shall be left as you were before, and neither richer nor wiser, unless the sense of service rendered to a man in mortal distress may be counted as a kind of riches of the soul. Or, if you shall so prefer to choose, a new province of knowledge and new avenues to fame and power shall be laid open to you, here, in this room, upon the instant ”