Freedom of speech is unnecessary if the people to whom it is granted do not think for themselves.
~ Mokokoma Mokhonoana
Think for yourself and let others enjoy the privilege of doing so too.
~ Voltaire
The man who does not do his own thinking is a slave, and is a traitor to himself and to his fellowmen.
~ Robert G. Ingersoll
[M]an is not permitted without censure to follow his own thoughts in the search of truth, when they lead him ever so little out of the common road.
~ John Locke