"Science, like philosophy, has sought to escape from the doctrine of perpetual flux by finding some permanent substrat…"

"The doctrine of perpetual flux, as taught by Heraclitus, is painful, and science, as we have seen, can do nothing to …"

"Philosophically inclined mystics, unable to deny that whatever is in time is transitory, have invented a conception o…"

"Heraclitus himself, for all his belief in change, allowed something everlasting. The conception of eternity (as oppos…"

"Nothing daunted, the physicists invented new and smaller units, called electrons and protons, out of which atoms were…"

"Passing from that small to the large, astronomy no longer allows us to regard the heavenly bodies as everlasting."

"The cheerfulness of the nineteenth century turned men against these static conceptions, and modern liberal theology b…"

"A dose of disaster is likely to bring men's hopes back to their older super-terrestrial forms: if life on earth is di…"

"He [Anaxagoras] rejected necessity and chance as giving the origins of things; nevertheless there was no "Providence"…"

"The south Italian and Sicilian philosophers were more inclined to mysticism and religion than those of Ionia, who wer…"