There is the greatest difference between presuming an opinion to be true, because, with every opportunity for contesting it, it has not been refuted, and assuming its truth for the purpose of not permitting its refutation.

The price paid for intellectual pacification is the sacrifice of the entire moral courage of the human mind.

Originality is the one thing which unoriginal minds cannot feel the use of.

Education is one of the subjects which most essentially require to be considered by various minds, and from a variety of points of view. For, of all many-sided subjects, it is the one which has the greatest number of sides.

A people may prefer a free government, but if by momentary discouragement or temporary panic, or a fit of enthusiasm for an individual, they can be induced to lay their liberties at the feet of even a great man, or trust him with powers to subvert their institutions, in all these cases they are unfit for liberty.

God is a word to express, not our ideas, but the want of them.

However unwillingly a person who has a strong opinion may admit the possibility that his opinion may be false, he ought to be moved by the consideration that, however true it may be, if it is not fully, frequently, and fearlessly discussed, it will be held as a dead dogma, not a living truth.