False words are not only evil in themselves, but they infect the soul with evil.

Either we shall find what it is we are seeking or at least we shall free ourselves from the persuasion that we know what we do not know.

[Not enough is known about solid geometry] and for two reasons: in the first place, no government places value on it; this leads to a lack of energy in the pursuit of it, and it is difficult. In the second place, students cannot learn it unless they have a teacher. But then a teacher can hardly be found.

The mere athlete becomes too much of a savage.

It gives me great pleasure to converse with the aged. They have been over the road that all of us must travel, and know where it is rough and difficult and where it is level and easy.

I am about to die, and that is the hour in which men are gifted with prophetic power.

Human beings have Love for one another inborn in them - Love, reassembler of our ancient nature, who tries to make one out of two and to heal human nature.