Sermons in stones

Sweet are the uses of adversity,

Which, like the toad, ugly and venomous,

Wears yet a precious jewel in his head;

And this our life, exempt from public haunt,

Finds tongues in trees, books in the running brooks,

Sermons in stones, and good in every thing.

-- William Shakespeare, As You Like It, Act 2, Scene 1, 12-17