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

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

Politeness is a desire to be treated politely, and to be esteemed polite oneself.

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

We are so accustomed to disguise ourselves to others that in the end we become disguised to ourselves.

We get so much in the habit of wearing disguises before others that we finally appear disguised before ourselves.