He is a fool that kisseth the maid when he may kiss the mistress.
— English Proverbs

The more one loves a mistress, the more one is ready to hate her.
— Francois de la Rochefoucauld

Power is my mistress. I have worked too hard at her conquest to allow anyone to take her away from me.
— Napoleon Bonaparte

Money is a handmaiden, if thou knowest how to use it; a mistress, if thou knowest not.
— Horace

Wives are young men's mistresses; companions for middle age, and old men's nurses.
— Francis Bacon