Opinion is like a pendulum and obeys the same law. If it goes past the centre of gravity on one side, it must go a like distance on the other; and it is only after a certain time that it finds the true point at which it can remain at rest.
Bad books are intellectual poison; they destroy the mind.
When we read, another person thinks for us: we merely repeat his mental process.
Man is but a reed, the most feeble thing in nature; but he is a thinking reed.
The authority of a king is purely physical, and it controls the actions of the subject without subduing his private will; but the majority possesses a power which is physical and moral at the same time; it acts upon the will as well as upon the actions of men, and it represses not only all contest, but all controversy.
He who lets the world, or his own portion of it, choose his plan of life for him, has no need of any other faculty than the ape-like one of imitation. He who chooses his plan for himself, employs all his faculties. He must use observation to see, reasoning and judgment to foresee, activity to gather materials for decision, discrimination to decide, and when he has decided, firmness and self-control to hold to his deliberate decision.