More will be accomplished, and better, and with more ease, if every man does what he is best fitted to do, and nothing else.

Necessity is literally the mother of invention.

[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 beginning is the chiefest part of any work.

Not to help justice in her need would be an impiety.

Those who reproach injustice do so because they are afraid not of doing it but of suffering it.

SOCRATES: Perhaps we may be wrong; if so, you in your wisdom should convince us that we are mistaken in preferring justice to injustice. THRASYMACHUS: And how am I to convince you, he said, if you are not already convinced by what I have just said; what more can I do for you? Would you have me put the proof bodily into your souls?