Nothing is so infectious as example.

I go at what I have to do as if there were nothing else in the world for me to do.

You are not very good if you are not better than your best friends imagine you to be.

I hope that my children, at least, if not I myself, will see the day when ignorance of the primary laws and facts of science will be looked upon as a defect only second to ignorance of the primary laws of religion and morality.

If you want to be miserable, think about yourself, about what you want, what you like, what respect people ought to pay you and what people think of you.

If you wish to be like a little child, study what a little child could understand — nature; and do what a little child could do — love.

Have charity; have patience; have mercy. Never bring a human being, however silly, ignorant, or weak--above all, any little child--to shame and confusion of face. Never by petulance, by suspicion, by ridicule, even by selfish and silly haste--never, above all, by indulging in the devilish pleasure of a sneer--crush what is finest and rouse up what is coarsest in the heart of any fellow-creature.