No person is ever good for much, that hasn't been swept off their feet by enthusiasm between ages twenty and thirty

Of all the evil spirits abroad at this hour in the world, insincerity is the most dangerous.

Experience teaches slowly, and at the cost of mistakes.

The endurance of the inequalities of life by the poor is the marvel of human society.

The superstition of science scoffs at the superstition of faith.

There are at bottom but two possible religions--that which rises in the moral nature of man, and which takes shape in moral commandments, and that which grows out of the observation of the material energies which operate in the external universe.

Science rests on reason and experiment, and can meet an opponent with calmness; [but] a creed is always sensitive.