Man's external form, marvellously constructed, is not much as compared with the divine soul that dwells inside that structure.

Movement will fail sooner than usefulness.

Though I may not . . . be able to quote other authors, I shall rely on that which is much greater and more worthy - on experience.

When that which loves is united to the thing beloved it can rest there; when the burden is laid down it finds rest there. There will be eternal fame also for the inhabitants of that town, constructed and enlarged by him.

An artist who lacks the power of self-criticism accomplishes but little. It is good if your work stands higher than your own opinion of it; bad if it is on the same level. But it is a great disaster if your work stands lower than your judgment of it.

If you throw a stone in a pond... the waves which strike against the shores are thrown back towards the spot where the stone struck; and on meeting other waves they never intercept each other's course... In a small pond one and the same stroke gives birth to many motions of advance and recoil.

Mechanics is the paradise of the mathematical sciences because by means of it one comes to the fruits of mathematics.