I shall never alter my ways, not even if I have to die many times.

If we are to have any hope for the future, those who have lanterns must pass them on to others.

One man cannot practice many arts with success.

One should turn towards the main ocean of the-beautiful-in-the-world so that one may by, contemplation of this Form, bring forth in all their splendor many fair fruits of discourse and meditation in a plenteous crop of philosophy.

It was Plato, according to Sosigenes, who set this as a problem for those concerned with these things, through what suppositions of uniform and ordered movements the appearances concerning the movements of the wandering heavenly bodies could be preserved.

Experience proves that anyone who has studied geometry is infinitely quicker to grasp difficult subjects than one who has not.

Be kind, for everyone is having a hard battle.