The more liberty you give away the more you will have.

By physical liberty I mean the right to do anything which does not interfere with the happiness of another. By intellectual liberty I mean the right to think wrong.

What light is to the eyes--what air is to the lungs--what love is to the heart, liberty is to the soul of man.

Every man who expresses an honest thought is a soldier in the army of intellectual liberty

Voltaire lighted a torch and gave to others the sacred flame. The light still shines and will as long as man loves liberty and seeks for truth.

I will not attack your doctrines nor your creeds if they accord liberty to me. If they hold thought to be dangerous - if they aver that doubt is a crime, then I attack them one and all, because they enslave the minds of men.