We are what we repeatedly do... excellence, therefore, isn't just an act, but a habit and life isn't just a series of events, but an ongoing process of self-definition.

Equality is of two kinds, numerical and proportional; by the first I mean sameness of equality in number or size; by the second, equality of ratios.

No one would choose a friendless existence on condition of having all the other things in the world.

The mathematical sciences particularly exhibit order symmetry and limitations; and these are the greatest forms of the beautiful.

It is a part of probability that many improbable things will happen.

If then, as we say, good craftsmen look to the mean as they work, and if virtue, like nature, is more accurate and better than any form of art, it will follow that virtue has the quality of hitting the mean. I refer to moral virtue [not intellectual], for this is concerned with emotions and actions, in which one can have excess or deficiency or a due mean.

The ideal man is his own best friend and takes delight in privacy.