Retaliation
Christ does not change the implanted law of nature, which teaches us to repel injury and force by force. Rather he only condemns retaliation (to antipeponthos) when to the defense of one’s self is added revenge and an equal or greater injury. These words must be understood proverbially and hyperbolically, not according to the letter (kata to rhēton); for Christ himself did not turn the other cheek to the one smiting him (Jn. 18:23), nor did Paul (Acts 23:3).
Francis Turretin, Institutes of Elenctic Theology, ed. James T. Dennison Jr., trans. George Musgrave Giger, vol. 2 (Phillipsburg, NJ: P&R Publishing, 1992-1997), 14.