The Three Musketeers by Alexandre Dumas Chapter 23 Page 22

and it is I who say it — see enemies in all directions. If anyone seeks a quarrel with you, shun it, were it with a child of ten years old. If you are attacked by day or by night, fight, but retreat, without shame; if you cross a bridge, feel every plank of it with your foot, lest one should give way beneath you; if you pass before a house which is being built, look up, for fear a stone should fall upon your head; if you stay out late, be always followed by your lackey, and let your lackey be armed — if, by the by, you can be sure of your lackey. Mistrust everybody, your friend, your brother, your mistress — your mistress above all.”

D’Artagnan blushed.

“My mistress above all,” repeated he, mechanically; “and why her rather than another?”