God: "I looked for someone to take a stand for me, and stand in the gap" (Ezekiel 22:30)
Now believing is nothing else but the accepting of Christ for thy Lord and Saviour as He is offered to thee in the gospel; and this accepting is principally, if not only, the act of thy will; so that if thou art sincerely and cordially willing to have Christ upon His own terms, upon gospel terms, that is, to save thee and rule thee, to redeem thee and to reign over thee, then thou art a believer.
The most compelling motivation for faithful, obedient living should not be the threat of discipline or loss of reward but overflowing and unceasing gratitude for the marvelous mercies of God.