For this is the will of God: your sanctification, that you abstain from sexual immorality,
By the lust of concupiscence, he means all base lusts of the flesh, but, at the same time, by this manner of expression, he brands with dishonor all desires that allure us to pleasure and carnal delights, as in Romans 13:14, he bids us have no care for the flesh in respect of the lust thereof. For when men give indulgence to their appetites, there are no bounds to lasciviousness. (567) Hence the only means of maintaining temperance is to bridle all lusts. 