Philosophy is the science which considers truth.

Plato is dear to me, but dearer still is truth.

But a man's best friend is the one who not only wishes him well but wishes it for his own sake (even though nobody will ever know it): and this condition is best fulfilled by his attitude towards himself - and similarly with all the other attributes that go to define a friend. For we have said before that all friendly feelings for others are extensions of a man's feelings for himself.

It is the activity of the intellect that constitutes complete human happiness - provided it be granted a complete span of life, for nothing that belongs to happiness can be incomplete.

We assume therefore that moral virtue is the quality of acting in the best way in relation to pleasures and pains, and that vice is the opposite.

Think as the wise men think, but talk like the simple people do.

Happiness, then, is found to be something perfect and self-sufficient, being the end to which our actions are directed.