We would rather see those to whom we do good, than those who do good to us.

Self-interest speaks all manner of tongues and plays all manner of parts, even that of disinterestedness.

Passion often makes fools of the wisest men and gives the silliest wisdom.

What renders us so changeable in our friendship is, that it is difficult to know the qualities of the soul, but easy to know those of the mind.

Numberless arts appear foolish whose secret motives are most wise and weighty.

We may give advice, but not the sense to use it.

Perfect behavior is born of complete indifference.