Animals hear about death for the first time when they die.

—Arthur Schopenhauer, 1819

Nature is the art of God.

—Thomas Browne, 1635

If people think Nature is their friend, then they sure don’t need an enemy.

—Kurt Vonnegut, 1988

We never are definitely right; we can only be sure we are wrong.

—Richard P. Feynman, 1965

I always think of nature as a great spectacle, somewhat resembling the opera.

—Bernard de Fontenelle, 1686

Nature never breaks her own laws.

—Leonardo da Vinci, c. 1500

Animals are such agreeable friends—they ask no questions, they pass no criticisms.

—George Eliot, 1857