I alone cannot change the world, but I can cast a stone across the water to create many ripples.
— Mother Teresa

Man is harder than iron, stronger than stone and more fragile than a rose.
— Proverbs

In darkness, the stone becomes the buffalo.
— African Proverbs

All misfortune is but a stepping stone to fortune.
— Henry David Thoreau

The first human being who hurled an insult instead of a stone was the founder of civilization.
— Sigmund Freud