The only freedom which deserves the name is that of pursuing our own good in our own way, so long as we do not attempt to deprive others of theirs, or impede their efforts to obtain it. Each is the proper guardian of his own health, whether bodily, or mental or spiritual. Mankind are greater gainers by suffering each other to live as seems good to themselves, than by compelling each to live as seems good to the rest.

The guesses which serve to give mental unity and wholeness to a chaos of scattered particulars, are accidents which rarely occur to any minds but those abounding in knowledge and disciplined in intellectual combinations.

The prevailing tendency to regard all the marked distinctions of human character as innate, and in the main indelible, and to ignore the irresistible proofs that by far the greater part of those differences, whether between individuals, races, or sexes are such as not only might but naturally would be produced by differences in circumstances, is one of the chief hinderances to the rational treatment of great social questions, and one of the greatest stumbling blocks to human improvement.

The study of science teaches young men to think, while study of the classics teaches them to express thought.

In all intellectual debates, both sides tend to be correct in what they affirm, and wrong in what they deny.

No longer enslaved or made dependent by force of law, the great majority are so by force of property; they are still chained to a place, to an occupation, and to conformity with the will of an employer, and debarred by the accident of birth to both the enjoyments, and from the mental and moral advantages, which others inherit without exertion and independently of desert. That this is an evil equal to almost any of those against which mankind have hitherto struggles, the poor are not wrong in believing.

The peculiarity of the evidence of mathematical truths is that all the argument is on one side.