Robert Matteson Johnston,
The Harvard Classics Vol. 51
(1914)
“ Greek philosophy was to prove the greatest intellectual asset of humanity. No other civilization or language before the Greek had invented the abstract ideas: time, will, space, beauty, truth, and the others. And from these wonderful, though imperfect, word ideas the vigorous and subtle Greek intellect rapidly raised a structure which found its supreme expression in Plato, Aristotle, and Zeno. But from the close of the Fourth Century before Christ, the time of Aristotle and his pupil Alexander the Great, Greek began to lose its vitality and to decay. ”
