ectypal.net

...when he gave unto us the law of our lives, the eternal and unchangeable rule of our obedience unto him, in the ten commandments, he gives no other reason to oblige us thereunto but this only, “I am the LORD thy God.” The sole formal reason of all our obedience is taken from his own nature and our relation unto him; nor doth he propose any other reason why we should believe him, or the revelation which he makes of his mind and will. And our faith is part of our obedience, the root and principal part of it; therefore, the reason of both is the same. Neither did our Lord Jesus Christ nor his apostles ever make use of such arguments or motives for the ingenerating of faith in the minds of men, nor have they given directions for the use of any such arguments to this end and purpose. But when they were accused to have followed “cunningly-devised fables,” they appealed unto Moses and the prophets, to the revelations they had themselves received, and those that were before recorded.