A man who cannot think is not an educated man however many college degrees he may have acquired.

Ability to think, like the violin or piano, requires daily practice.

Paper is to write things down that we need to remember. Our brains are used to think.

Think before you speak, your words could hurt someone's feeling more than you intended it to.

Even people who aren't geniuses can outthink the rest of mankind if they develop certain thinking habits.

Men who think deeply say little in ordinary conversations.