I hold it to be a proof of great prudence for men toabstain from threats and insulting words toward an enemy, for neither ...diminishes the strength of the enemy; but the one makes him more cautious,and the other increases his hatred of you and makes him

Out ofthe fullness of the heart the mouth speaks.

If a man speaks or acts with pure thought, happiness follows him like a shadow that never leaves him

Another form of wastefulness is expenditure of words beyond the income of ideas.

Science has promised us truth. It has never promised us either peace or happiness.

A man of great common sense and good taste-meaning there a man without originality or moral courage.

Never ask a barber if you need a haircut.

It isnot necessary to understand things in order to argue about them.

Conflictis the gadfly of thought. It stirs us to observation and memory. Itinstigates to invention. It shocks us out of sheeplikepassivity, and sets us at noting and contriving.

The most imaginative people are the most credulous, for to them everything is possible.

Neverdoubt that a small group of thoughtful, committed people can change theworld. Indeed, it's the only thing that ever has.

Almost all of our relationships begin and most of them continue as forms of mutual exploitation, a mental or physical barter, to be terminated when one or both parties run out of goods.