Only when Genius is married to Science can the highest results be produced.

We must infer that a plant or animal of any species, is made up of special units, in all of which there dwells the intrinsic aptitude to aggregate into the form of that species: just as in the atoms of a salt, there dwells the intrinsic aptitude to crystallize in a particular way.‎

Education has for its object to develop the child into a man of well proportioned and harmonious nature-this is alike the aim of parent and teacher.

Without painting, sculpture, music, poetry, and the emotions produced by natural beauty of every kind, life would lose half its charm.

If every man has freedom to do all that he wills, provided he infringes not the equal freedom of any other man, then he is free to drop connection with the state-to relinquish its protection, and to refuse paying toward its support.

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.

Hero-worship is strongest where there is least regard for human freedom.