I am too much of a skeptic to deny the possibility of anything.

The thought process can never be complete without articulation.

To many people chess is an extreme sport. It requires thinking.

At a time like this, we can't afford the luxury of thinking!

When you think about the wasted time, you waste your time again.

There’s enough metaphysics in not thinking about anything.

The mind is not a vessel to be filled, but a fire to be kindled.

Uninspired minds are perpetual creators of obstacles to progress

When Douglas walked, his mind ran, when he ran, his mind walked.

Think big.Dream great dreams.Take action to realize your dreams.

I’ve got better things to think about than thoughtlessness.

Life is a comedy to those who think, a tragedy to those who feel.

I rather enjoy being contradicted. It forces me to think harder.

Our way of thinking causes us more pain than all our misfortunes.

You know the minute you stop thinking about it, it'll happen.