...that not life, but a good life, is to be chiefly valued.

Dictatorship naturally arises out of democracy, and the most aggravated form of tyranny and slavery out of the most extreme liberty.

The ludicrous state of solid geometry made me pass over this branch.

Let nobody speak mischief of anybody.

Remember our words, then, and whatever is your aim let virtue be the condition of the attainment of your aim, and know that without this all possessions and pursuits are dishonourable and evil.

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

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