We know less when we erroneously think we know than when we recognize that we don’t.

Isn't it strange that we talk least about the things we think about most?

I try not to think too much. Like other things now, thought must be rationed

Thinking is hard work; that’s why so few do it.

More often than not, it seems that people are having thoughts, though not really thinking about what they’re thinking about — at least not in an effective way that resolves, advances, or manages the content.

It requires less mental effort to condemn than to think.

Seldom do people think things through foolishly. More often, they do not bother to think things through at all, so that even brainy individuals can reach untenable conclusions because their brainpower means little if it is not deployed and applied.

In order to improve the mind, we ought less to learn than to contemplate.

People calculate too much and think too little.

True thinking is rare — just like true listening.

We think too much and feel too little.

We only think when confronted with a problem.

We need much less than we think we need.

The less men think, the more they talk