Tertullian

“ If, however, it is the nature of an evil which is the means which compels the predicating “good,” it is not so much “good” as a species of inferior evil, which by being obscured by a superior evil is driven to the name of good. Take away, in short, the condition of comparison, so as not to say, “Better it is to marry than to burn;” ”

“ Indulgence is the source of all permission. And albeit indulgence is not independent of volition, still, inasmuch as it has its cause in him to whom the indulgence is granted, it comes (as it were) from unwilling volition, having experienced a producing cause of itself which constrains volition. See what is the nature of a volition of which some second party is the cause. There is, again, a second species of pure volition to be considered. God wills us to do some acts pleasing to [2] Himself, in which it is not indulgence which patronizes, but discipline which lords it. ”

“ If, however, He has given a preference over these to some other acts— (acts) , of course, which He more wills—is there a doubt that the acts which we are to pursue are those which He more wills; since those which He less wills (because He wills others more) are to be similarly regarded as if He did not will them? ”