The worst thing you can possibly do is worrying and thinking about what you could have done.
Georg C. Lichtenberg
I worry that the person who thought up Muzak may be thinking up something else
Lily Tomlin
When you worry, you go over the same ground endlessly and come out the same place you started. Thinking, on the other hand, makes progress from one place to another. ... The problem of life is to change worry into thinking, and anxiety into creative action.
Harold B. Walker
The act of smelling something, anything, is remarkably like the act of thinking. Immediately at the moment of perception, you can feel the mind going to work, sending the odor around from place to place, setting off complex repertories through the brain, polling one center after another for signs of re recognition, for old memories and old connection.
Lewis Thomas
Democracy is essentially anti-authoritarian--that is, it not only demands the right but imposes the responsibility of thinking for ourselves.
John Dryden
Rapine, avarice, expense, This is idolatry; and these we adore; Plain living and high thinking are no more.
William Wordsworth
Many people think they are thinking when they are merely rearranging their prejudices.
William James
One always overcompensates for disabilities. I'm thinking of having my entire body surgically removed.
Douglas Adams
Determination and perseverance move the world; thinking that others will do it for you is a sure way to fail.
Marva Collins
Men's thinking that you must halt before the barrier of inner negativity. You need not. You can crash through...whatever we see a negative state, that is where we can destroy it.
Marquis de Vauvenargues
The end comes when we no longer talk with ourselves. It is the end of genuine thinking and the beginning of the final loneliness.
Edward Gibbon
Where a man has a passion for meditating without the capacity of thinking, a particular idea fixes itself fast, and soon creates a mental disease
Johann Wolfgang von Goethe
Indecision has often given an advantage to the other fellow because he did his thinking beforehand.
Maurice Switzer