Ask the right questions, and nature will open the doors to her secrets.
Anything that gives us new knowledge gives us an opportunity to be more rational.
You can buy my time and effort, but you have to earn my dedication.
In a rational society we would want our presidents to be teachers. – In our actual society we insist they be cheerleaders.
The deepest sin against the human mind is to believe things without evidence.
Never mistake motion for action.
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.
That rifle on the wall of the labourer’s cottage or working class flat is the symbol of democracy. It is our job to see that it stays there.
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 man who dares to waste one hour of time has not discovered the value of life.