For, truly speaking, whoever provokes me to a good act or thought has given me a pledge of his fidelity to virtue,--he has come under the bonds to adhere to that cause to which we are jointly attached.

Happy is the hearing man; unhappy the speaking man.

Genius detects through the fly, through the caterpillar, through the grub, through the egg, the constant individual; through countless individuals the fixed species; through many species the genus; through all genera the steadfast type; through all the kingdoms of organized life the eternal unity. Nature is a mutable cloud which is always and never the same.

Nature suffers nothing to remain in her kingdom which cannot help itself.

When believers and unbelievers live in the same manner - I distrust the religion.

Every man is entitled to be valued by his best moment.

You cannot do a kindness too soon, for you never know how soon it will be too late.