Tertullian

Or do you think that every believer is entitled to originate and establish a law, if only it be such as is agreeable to God, as is helpful to discipline, as promotes salvation, when the Lord says, "But why do you not even of your own selves judge what is right? " And not merely in regard to a judicial sentence, but in regard to every decision in matters we are called on to consider, the apostle also says, "If of anything you are ignorant, God shall reveal it unto you; " he himself, too, being accustomed to afford counsel though he had not the command of the Lord, and to dictate of himself as possessing the Spirit of God who guides into all truth.