The secret of the stars, -- gravitation.
The secret of the earth, -- layers of rock.
The secret of the soil, -- to receive seed.
The secret of the seed, -- the germ.
The secret of man, -- the sower.
The secret of woman, -- the soil.
My secret: Under a mound that you shall never find.

Edgar Lee Masters

http://www.poemhunter.com/poem/mrs-sibley/