The man who does not do his ...

The man who does not do his own thinking is a slave, and is a traitor to himself and to his fellow-men.
The man who does not do his own thinking is a slave, and is a traitor to himself and to his fellow-men.

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All the great things are simple, and many can be expressed in a single word: freedom, justice, honor, duty, mercy, hope.
I know but one freedom and that is the freedom of the mind.
 Antoine de Saint-Exupéry
Freedom is not worth having if it does not connote freedom to err.
The amount of happiness that you have depends on the amount of freedom you have in your heart.
 Thích Nhất Hạnh
Without freedom of thought, there can be no such thing as wisdom - and no such thing as public liberty without freedom of speech.

Quotes from the same author

Like an armed warrior, like a plumed knight, James G. Blaine marched down the halls of the American Congress and threw his shining lance full and fair against the brazen foreheads of the defamers of his country, and the maligners of his honor.
The myth of hell represents all the meanness, all the revenge, all the selfishness, all the cruelty, all the hatred, all the infamy of which the heart of man is capable.
The greatest superstition now entertained by public men is that hypocrisy is the royal road to success.
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.
He loves his country best who strives to make it best.