Thinking is the hardest work there is, which is probably the reason why so few engage in it.

The real danger is not that computers will begin to think like men, but that men will begin to think like computers.

Whether you think you can or think you can't -- you're right.

My problem is I say what I'm thinking before I think what I'm saying.

There are two kinds of people: Those who stop to think and Those who stop thinking.

As a man thinks in his heart, so is he.

Sooner or later, those who win are those who think they can.

A diplomat must always think twice before he says nothing.

No lions are ever caught in mousetraps. To catch lions you must think in terms of lions, not in terms of mice. Your mind is always creating traps of one kind or another, and what you catch depends on the thinking you do. It is your thinking that attracts to you what you receive.

Silence and thinking never hurt anyone.

I think and think for months and years. Ninety-nine times, the conclusion is false. The hundredth time I am right.

Most of us can do more than we think we can, but we usually do less than we think we do.

Man becomes that of which he thinks.

Speaking without thinking is shooting without taking aim.

The worlds of thought and action overlap. What you think has a way of becoming true.

Every good thought you think is contributing its share to the ultimate result of your life.

To have ideas is to gather flowers; to think, is to weave them into garlands.

To take time to think is to gain time to live.

The brain is like a muscle. When we think well, we feel good. Understanding is a kind of ecstasy.

Nothing is good or bad, but thinking makes it so.

Act locally, but think globally.

It is what we think we know already that often prevents us from learning.

Think big thoughts but relish small pleasures.

The life you are leading is simply a reflection of your thinking.

Think before you think!

The brain has muscles for thinking as the legs have muscles for walking.

Think all you want: Thoughts are toll-free.

Your thinking is simply a reflection of your heart.

Your life is a reflection of your thoughts. If you change your thinking, you change your life.