'Faith cannot be so difficult, surely,' says William Guthrie in his _Saving Interest_, 'when it consists of so much in _desire_.' Now, both its exceeding difficulty and its exceeding ease also just consist in that. Nothing is so easy to a healthy man as the desire for food; but, then, nothing is so impossible to a dead man, or even to a sick man, as just desire. Desire sounds easy, but how few among us have that capacity and that preparation for Christ and His salvation that stands in desire. Have you that desire? Really and truly, in your heart of hearts, have you that desire? Then how well it is with you! For that is all that God looks for in him who comes to the poor man's market; indeed, it is the only currency accepted there. Isaiah's famous invitation is drawn out just to meet the case of a man who has desire, and nothing but desire, in his heart. All the encouragements and assurances that his evangelical genius can devise are set forth by the prophet to attract and to win the desiring heart. The desiring heart says to itself, I would give the whole world if I had it just to see Christ, just to be near Christ, and just, if it were but possible, that I should ever be the least thing like Christ. Now, that carries God. God, the Father of our Lord Jesus Christ, cannot resist that. No true father could, and least of all a father who loves his son, and who has such a son to love as God has in Christ. Well, He says; if you love and desire, honour and estimate My Son like that, I cannot deny Him the reward and the pleasure of possessing you and your love. And thus, without any desert in you--any desert but sheer desire--you have made the greatest, the easiest, the speediest, the most splendid purchase that all the poor man's market affords. No, William Guthrie; faith is not so very difficult to the sinner who has desire. For where desire of the right quality is, and the right quantity, there is everything. And all the merchandise of God is at that sinner's nod and bid.