Whetstones are not themselves able to cut, but make iron sharp and capable of cutting.

So far has Athens left the rest of mankind behind in thought and expression that her pupils have become the teachers of the world, and she has made the name of Hellas distinctive no longer of race but of intellect, and the title of Hellene a badge of education rather than of common descent.

Of all our possessions, wisdom alone is immortal.

But I marvel when I observe these men setting themselves up as instructors of youth who cannot see that they are applying the analogy of an art with hard and fast rules to a creative process

Guard yourself against accusations, even if they are false; for the multitude are ignorant of the truth and look only to reputation.

Abhor flatterers as you would deceivers; for both, if trusted, injure those who trust them. If you admit as friends men who seek your favor for the lowest ends, your life will be lacking in friends who will risk your displeasure for the highest good.

It is not fitting that the evil produced by men should be imputed to things; let those bear the blame who make an ill use of things in themselves good.