"The whole theory of warfare is calculated risk," the Duke said, "but when it comes to risking your own family, the element of calculation gets submerged in.. other things." — Dune
The banker put down his fork, spoke in an angry voice: "It's said that the Fremen scum drink the blood of their dead." Kynes shook his head, spoke in a lecturing tone: "Not the blood, sir. But all of a man's water, ultimately, belongs to his people—to his tribe. It's a necessity when you live near the Great Flat. All water's precious there, and the human body is composed of some seventy per cent water by weight. A dead man, surely, no longer requires that water." — Dune