2PE 2:19

19 [The false teachers] tell people that they are free [to do whatever they want to do, even though] they themselves are [like] slaves [MET] [because their own self-directed nature forces them to do] sinful things. [Think about these well-known words: “Whenever a person is controlled by something] {[something controls a person]}, [it is as though] that person has become a slave of what controls him.”