Never mistake motion for action.
Never memorize something that you can look up.
The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.
Ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science.
Education is the most powerful weapon which you can use to change the world.
The only true wisdom is in knowing you know nothing.
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.
A concept is a brick. It can be used to build a courthouse of reason. Or it can be thrown through the window.
To such a world of conflict, a world of victims, and executions, it is the job of thinking people not to be on the side of the executioners.