It appears, then, to be a condition of a genuinely scientific hypothesis, that it be not destined always to remain an hypothesis, but be certain to be either proved or disproved by.. .comparison with observed facts.

It is conceivable that religion may be morally useful without being intellectually sustainable.

It is not because men's desires are strong that they act ill; it is because their consciences are weak.

The only part of the conduct of any one, for which he is amenable to society, is that which concerns others. In the part which merely concerns himself, his independence is, of right, absolute. Over himself, over his own body and mind, the individual is sovereign.

Whatever helps to shape the human being - to make the individual what he is, or hinder him from being what he is not - is part of his education.

Any society which is not improving is deteriorating, and the more so the closer and more familiar it is. Even a really superior man almost always begins to deteriorate when he is habitually king of his company.

The liberty of the individual must be thus far limited; he must not make himself a nuisance to other people.