We have now to treat of Christian liberty, an explanation of which ought not to be omitted in a treatise which is designed to comprehend a compendious summary of evangelical doctrine. For it is a subject of the first importance, and unless it be well understood, our consciences scarcely venture to undertake any thing without doubting, experience in many things hesitation and reluctance, and are always subject to fluctuations and fears. But especially it is an appendix to justification, and affords no small assistance towards the knowledge of its influence. Hence they who sincerely fear God will experience the incomparable advantage of that doctrine, which impious scoffers pursue with their railleries; because in the spiritual intoxication with which they are seized, they allow themselves the most unbounded impudence. Wherefore this is the proper time to introduce the subject; and though we have slightly touched upon it on some former occasions, yet it was useful to defer the full discussion of it to this place; because, as soon as any mention is made of Christian liberty, then either inordinate passions rage, or violent emotions arise, unless timely opposition be made to those wanton spirits, who most nefariously corrupt things which are otherwise the best. For some, under the pretext of this liberty, cast off all obedience to God, and precipitate themselves into the most unbridled licentiousness; and some despise it, supposing it to be subversive of all moderation, order, and moral distinctions. What can we do in this case, surrounded by such difficulties? Shall we entirely discard Christian liberty, and so preclude the occasion of such dangers? But, as we have observed, unless this be understood, there can be no right knowledge of Christ, or of evangelical truth, or of internal peace of mind. We should rather exert ourselves to prevent the suppression of such a necessary branch of doctrine, and at the same time to obviate those absurd objections which are frequently deduced from it.