The essence of the independent mind lies not in what it thinks, but in how it thinks.

For I have always been a seeker, a dreamer, and a ponderer on seeking and dreaming...

The difficulty lies not so much in developing new ideas as in escaping from old ones.

If you are thinking of making everyone happy, you are going to be a great prostitute.

The book to read is not the one that thinks for you but the one which makes you think.

Poirot," I said. "I have been thinking.""An admirable exercise my friend. Continue it.

Mistakes should be examined, learned from, and discarded; not dwelled upon and stored.

.it's a long road when you're on your own ,but there's no better teacher..

I can’t believe you think that I can’t believe you don’t think that.

I think I have a strange thing growing out of my neck that causes me to think too much.

there are things some people can never understand.there's no point to telling them.

Let me thinkThinking is all I haveIf wisdom is a pretenseThen let me pretend to be wise

We can't solve a problem by using the same kind of thinking we used to create them.

I was thinking...""We know," Pedro said, "It was like sitting next to a pressure cooke

If you smile when you are alone, then you really mean it, or you're up to something.