As all curves have reference to their centres or foci, so all beauty of character has reference to the soul, and is a graceful gesture of recognition or waving of the body toward it.

Mathematics should be mixed not only with physics but with ethics.

Speech is for the convenience of those who are hard of hearing; but there are many fine things which we cannot say if we have to shout.

Only that day dawns to which we are awake.

In how few words, for instance, the Greeks would have told the story of Abelard and Heloise, making but a sentence of our classical dictionary.... We moderns, on the other hand, collect only the raw materials of biography and history, "memoirs to serve for a history," which is but materials to serve for a mythology.

You must get your living by loving, or at least half your life is a failure.

It will be seen that we contemplate a time when man's will shall be law to the physical world, and he shall no longer be deterredby such abstractions as time and space, height and depth, weight and hardness, but shall indeed be the lord of creation.