Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.

No man is free who is not master of himself.

Liberty is the right to do what the law permits.

True freedom is impossible without a mind made free by discipline.

Between stimulus and response there is a space. In that space is our power to choose our response.

The only real prison is fear, and the only real freedom is freedom from fear.