If I look confused it is because I am thinking.
Samuel Goldwyn

When the mind is thinking it is talking to itself.
Plato

Thinking: the talking of the soul with itself.
Plato

A long habit of not thinking a thing wrong gives it a superficial appearance of being right.
Thomas Paine

When men yield up the privilege of thinking, the last shadow of liberty quits the horizon.
Thomas Paine

There are two distinct classes of what are called thoughts: those that we produce in ourselves by reflection and the act of thinking and those that bolt into the mind of their own accord.
Thomas Paine

Liberal soccer moms are precisely as likely to receive anthrax in the mail as to develop a capacity for linear thinking.
Ann Coulter

As long as your going to be thinking anyway, think big.
Donald Trump

If you're going to be thinking, you may as well think big.
Donald Trump

I like thinking big. If you're going to be thinking anything, you might as well think big.
Donald Trump

If everyone is thinking alike, then somebody isn't thinking.
George S. Patton

No problem can withstand the assault of sustained thinking.
Voltaire

Meditation is the dissolution of thoughts in Eternal awareness or Pure consciousness without objectification, knowing without thinking, merging finitude in infinity.
Voltaire

What then do you call your soul? What idea have you of it? You cannot of yourselves, without revelation, admit the existence within you of anything but a power unknown to you of feeling and thinking.
Voltaire

Science is a way of thinking much more than it is a body of knowledge.
Carl Sagan

I am neither bitter nor cynical but I do wish there was less immaturity in political thinking.
Franklin D. Roosevelt

Get into a line that you will find to be a deep personal interest, something you really enjoy spending twelve to fifteen hours a day working at, and the rest of the time thinking about.
Earl Nightingale

To my way of thinking, an actor's course is set even before he's out of the cradle.
James Dean

There is no expedient to which a man will not go to avoid the labor of thinking.
Thomas A. Edison

The best thinking has been done in solitude. The worst has been done in turmoil.
Thomas A. Edison