Mankind will never see an end of trouble until lovers of wisdom come to hold political power, or the holders of power become lovers of wisdom

If someone separated the art of counting and measuring and weighing from all the other arts, what was left of each (of the others) would be, so to speak, insignificant.

To conquer oneself is the best and noblest victory; to be vanquished by one's own nature is the worst and most ignoble defeat.

It is as expedient that a wicked man be punished as that a sick man be cured by a physician; for all chastisement is a kind of medicine.

The soul is like a pair of winged horses and a charioteer joined in natural union.

Harmony is a symphony, and symphony is an agreement; but an agreement of disagreements while they disagree there cannot be; you cannot harmonize that which disagrees.

We do not learn, and that what we call learning is only a process of recollection.