There is nothing either good or bad, but thinking makes it so.
WILLIAM SHAKESPEARE, Hamlet
In martial arts, as in life, you quickly learn not to think too much. You have to do. While you're thinking, you open spaces where an opponent can successfully strike at you. The more you think, the more vulnerable you become.
Willpower is not some mythical force that we either have or don't have. Willpower is our decision to use higher-mind thinking instead of lazing around in the clutches of our primal mind.
A.B. CURTISS, Depression Is a Choice
Ultimately, thinking is a very inefficient method of processing data.
FREDERICK LENZ, Surfing the Himalayas
I don't believe in thought. Too much thinking.
PHILIP MOELLER, The Roadhouse in Arden
Man is distinguished from the brute animals in proportion as thought prevails over sense: but in the healthy processes of the mind, a balance is constantly maintained between the impressions from outward objects and the inward operations of the intellect:--for if there be an overbalance in the contemplative faculty, man thereby becomes the creature of mere meditation, and loses his natural power of action.
SAMUEL TAYLOR COLERIDGE, "Notes on Hamlet"
Not to be able to stop thinking is a dreadful affliction, but we don't realize this because almost everybody is suffering from it, so it is considered normal. This incessant mental noise prevents you from finding that realm of inner stillness that is inseparable from Being.
ECKHART TOLLE, The Power of Now
Curtsey while you're thinking what to say. It saves time.
LEWIS CARROLL, Alice Through the Looking Glass