A tree’s a tree. How many more do you need to look at?

—Ronald Reagan, 1965

Nature never breaks her own laws.

—Leonardo da Vinci, c. 1500

Men argue, nature acts.

—Voltaire, 1764

There is not a sprig of grass that shoots uninteresting to me.

—Thomas Jefferson, 1790

Nature resolves everything into its component elements, but annihilates nothing.

—Lucretius, c. 57 BC

When you have only two pennies left in the world, buy a loaf of bread with one, and a lily with the other.

—Chinese proverb

Nature is the art of God.

—Thomas Browne, 1635

Nature is immovable.

—Euripides, c. 415 BC

A garden must be looked into, and dressed as the body.

—George Herbert, 1640

The temple bell stops but I still hear the sound coming out of the flowers.

—Basho, c. 1690

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

—George Eliot, 1857

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

—Richard P. Feynman, 1965

Drive out nature with a pitchfork, and she will always come back. 

—Horace, c. 25 BC