Virtue means doing the right thing, in relation to the right person, at the right time, to the right extent, in the right manner, and for the right purpose. Thus, to give money away is quite a simple task, but for the act to be virtuous, the donor must give to the right person, for the right purpose, in the right amount, in the right manner, and at the right time.

Boundaries don't protect rivers, people do.

To Unlearn is as hard as to Learn

One swallow does not make a spring, nor does one fine day.

Those who cannot bravely face danger are the slaves of their attackers.

The one exclusive sign of thorough knowledge is the power of teaching.

The bad man is continually at war with, and in opposition to, himself.