The sure way to be cheated is to think one's self more cunning than others.

The surest way to be deceived is to consider oneself cleverer than others.

Self-interest makes some people blind, and others sharp-sighted.

Ridicule dishonors a man more than dishonor does.

We are more often treacherous through weakness than through calculation.

Being a blockhead is sometimes the best security against being cheated by a man of wit.