The deepest sin against the human mind is to believe things without evidence.
To him who looks upon the world rationally, the world in its turn presents a rational aspect. The relation is mutual.
The test of a first rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.
The solutions all are simple…after you have arrived at them. But they’re simple only when you know already what they are.
Man once surrendering his reason, has no remaining guard against absurdities the most monstrous, and like a ship without rudder, is the sport of every wind.
Somewhere, something incredible is waiting to be known.
In a rational society we would want our presidents to be teachers. – In our actual society we insist they be cheerleaders.
Anything that gives us new knowledge gives us an opportunity to be more rational.
Never mistake motion for action.