Thinking is not the same as knowing.

Nothing is ever said that has not been thought out beforehand.

When all people think alike, no-one thinks very much.

Those who don't think much of themselves are better than they think.

There is nothing either good or bad, but thinking makes it so.

To believe everything or to doubt everything is to stop thinking.

We think as we do mainly because others think so.

Misery is often the result of thinking too much.

He thinks too much: such men are dangerous.

Some people never stop to think - others never think to stop.

We are the result of our thoughts.

We are what we think we are.

Think first - then speak.

Quoting from other people is a substitute for thinking for yourself.

You can't be happy if you think too much.

A conclusion is when you get tired of thinking.

Necessity is easier than thinking.

Often when we think we are thinking we are merely rearranging our prejudices.

We may not be responsible for our thoughts but we are for our deeds.

He who thinks he is wise is a fool.

A philosopher is one who doubts.

No bookmaker thinks gambling is a mug's game.

You're not happy unless you think you are.

To think evil is much the same as doing it.

Prejudices are a short cut to thinking.

A drunk person will always say what a sober person is thinking.

You can educate a person but you can't make him think.

Learning is sometimes a convenient way of not having to think.

If you think too much much, you will probably find something to worry about.