MANNA, n. A food miraculously given to the Israelites in the wilderness. When it was no longer supplied to them they settled down and tilled the soil, fertilizing it, as a rule, with the bodies of the original occupants.
OYSTER, n. A slimy, gobby shellfish which civilization gives men the hardihood to eat without removing its entrails! The shells are sometimes given to the poor.
Think of the fierce energy concentrated in an acorn! You bury it in the ground, and it explodes into an oak! Bury a sheep, and nothing happens but decay.