Tertullian

“ Chapter VIII.—If It Be Granted that Second Marriage is Lawful, Yet All Things Lawful are Not Expedient.
Let it now be granted that repetition of marriage is lawful, if everything which is lawful is good. The same apostle exclaims: “All things are lawful, but all are not profitable.” [1] Pray, can what is “not profitable” be called good? If even things which do not make for salvation are “lawful,” it follows that even things which are not good are “lawful.” ”