Thinking is not doing.

If you’re not making mistakes, you’re not learning.

Evidence shows that we do much less thinking than we believe we do — except, of course, when we think about it.

If you're not making mistakes, then you're not doing anything. I'm positive that a doer makes mistakes.

Thinking is a terrible disadvantage with which most people are not burdened. Being able to think merely makes you aware of the outrages around you.

Lernen und nicht denken ist nichtig, denken und nicht lernen ist ermüdend.

To expect truth to come from thinking signifies that we mistake the need to think with the urge to know.

When we respond without reasoning, we’re more likely to make mistakes that seem obvious in hindsight. In fact, when we respond emotionally, we often don’t even realize that we’re in a position that calls for thinking at all.

Reacting is automatic, but thinking is not.

We can't solve problems by using the same kind of thinking we used when we created them.

But we don't want to think. It's exhausting enough without that. We didn't think when we did the Ginkgo Pictures, at all. Afterwards we found out all this stuff about them.

You can’t concentrate on doing anything if you are thinking, “What’s gonna happen if it doesn’t go right?

What we think we are surely going to do, we don't do; and what we never intended to do, we may one day notice that we have done, and done, and done. (Forward)

never make a decision when you are desperate because that is a mistake most of us make.