We find it hard to get and to keep any private property in thought. Other people are all the time saying the same things we are hoarding to say when we get ready.

Every real thought on every real subject knocks the wind out of somebody or other.

To think great thoughts you must be heroes as well as idealists.

To meditate is to labour; to think is to act.

You may derive thoughts from others; your way of thinking, the mould in which your thoughts are cast, must be your own.

My thoughts are my company; I can bring them together, select them, detain them, dismiss them.

The thoughts that come often unsought, and, as it were, drop into the mind, are commonly the most valuable of any we have.

Horror films do not prepare us for the hours lost in searching after one clear thought.

All deep, earnest thinking is but the intrepid effort of the soul to keep the open independence of her sea, while the wildest winds of heaven and earth conspire to cast her on the treacherous, slavish shore.

Thinking is, or ought to be, a coolness and a calmness; and our poor hearts throb, and our poor brains beat too much for that.