Not only the grounds of the opinion are forgotten in the absence of discussion, but too often the meaning of the opinion itself... Instead of a vivid conception and a living belief, there remain only a few phrases retained by rote; or, if any part, the shell and husk only of the meaning is retained, the finer essence being lost.

Induction is a process of inference; it proceeds from the known to the unknown.

He who lets the world choose his plan of life for him has need of no other faculty than that of ape-like imitation.

A person should be free to do as he likes in his own concerns; but he ought not to be free to do as he likes in acting for another, under the pretext that the affairs of the other are his own affairs.

The despotism of custom is on the wane. We are not content to know that things are; we ask whether they ought to be.

The pupil who is never required to do what he cannot do, never does what he can do.

No slave is a slave to the same lengths, and in so full a sense of the word, as a wife is.