Worse than any severe mental illness, is the illness of bigotry.
The whole of science is nothing more than a refinement of everyday thinking.
If I have seen further it is by standing on the shoulders of Giants.
Rationality attracts conscientious humans, whereas mysticism attracts fools.
Kindness is the language which the deaf can hear and the blind can see.
The deepest sin against the human mind is to believe things without evidence.
Never mistake motion for action.
Maybe true travel is not the transportation of the body, but a change of perception, renewing the mind.
The first rule is not to lose. The second rule is not to forget the first rule.
Time and space are modes by which we think and not conditions in which we live.