A jury is composed of twelve men of average ignorance.

Religion has been compelled by science to give up one after another of its dogmas. . . .

No place, no company, no age, no person is temptation-free; let no man boast that he was never tempted, let him not be high-minded, but fear, for he may be surprised in that very instant wherein he boasteth that he was never tempted at all.

The preservation of health is a duty. Few seem conscious that there is such a thing as physical morality.

The forces which are working out the great scheme of perfect happiness, taking no account of incidental suffering, exterminate such sections of mankind as stand in their way, with the same sternness that they exterminate beasts of prey and herds of useless ruminants.

Do not try to produce an ideal child, it would find no fitness in this world.

This survival of the fittest which I have here sought to express in mechanical terms, is that which Mr. Darwin has called "natural selection", or the preservation of favoured races in the struggle for life.