“A long habit of not thinking a thing wrong, gives it a superficial appearance of being right, and raises at first a formidable outcry in defense of custom. But the tumult soon subsides. Time makes more converts than reason.”

Thinking always ahead, thinking always of trying to do more, brings a state of mind in which nothing is impossible.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

In Hinduism, conscience, reason and independent thinking have no scope for development.

I was walking through the woods, thinking about christ. If he was a carpenter, I wondered what he charged for bookshelves.

When one thinks what one leaves in the world when one dies, Only silence is strong, - all the rest is but lies.

The best thinking has been done in solitude. The worst has been done in turmoil.

When the mind is thinking it is talking to itself.

I was a chemistry major, but I'm always winding up as a teacher in english departments, so I've brought scientific thinking to literature. There's been very little gratitude for this.