Hast thou faith? have it to thyself before God,.... Which is to be understood, not of faith in the Lord Jesus Christ, and in the doctrines of the Gospel; for a man that has such faith given him, ought not to keep it in his own breast, but to declare it to others; he ought to make a public visible profession of it, before many witnesses; it becomes him to tell the church of God what great things the Lord has done for him; and as he believes with the heart, so he ought to make confession with the mouth unto salvation; but this faith only designs a full persuasion in a man's own mind, about the free and lawful use of things indifferent, the subject the apostle is upon; see Ro 14:5; and his advice on this head is, to keep this faith and persuasion in a man's own breast, and not divulge it to others, where there is danger of scandal and offence: he does not advise such to alter their minds, change their sentiments, or cast away their faith, which was right and agreeable to his own, but to have it, hold and keep it, though, within themselves; he would not have them openly declare it, and publicly make use of it, since it might be grieving and distressing to weak minds; but in private, and where there was no danger of giving offence, they might both speak of it, and use it; and if they could not, should satisfy themselves that God, who sees in secret, knows they have this faith, and sees their use of it, though others do not, for from him they have it; so the Ethiopic version reads it, and "if thou hast faith with thyself, thou art secure before God, from whom thou hast obtained it"; and should be thankful to him for it, and use it in such a manner as makes most for his glory, and the peace of his church since to him they must give an account another day: some copies and versions read without an interrogation, thou hast faith; and others, "thou, the faith which thou hast, have it to thyself", &c.
so the Alexandrian copy and the Syriac version.