It may be worth our while to inquire into the especial nature of this duty which we are exhorted unto; for we may every day more and more understand the weakness of many, who think, it may be, they know something of it, when they know not what it means. We may, therefore, consider three things in it:-- (1.) What is the special and immediate object of this exercise of faith; (2.) What is the form or special nature of it; and, (3.) What is the way and manner of its performance.