Our Lord gives us the five marks, or essential elements, of true prayer. There must be, first, the heart's _desire_; then the expression of that desire in _prayer_; with that, the _faith_ that carries the prayer to God; in that faith, the _acceptance of God's answer_; then comes _the experience_ of the desired blessing. It may help to give definiteness to our thought, if we each take a definite request in regard to which we would fain learn to pray believingly. Or, perhaps better still, we might all unite and take the one thing that has been occupying our attention. We have been speaking of failure in prayer; why should we not take as the object of desire and supplication the "grace of supplication," and say, I want to ask and receive in faith the power to pray just as, and as much as, my God expects of me? Let us meditate on our Lord's words, in the confidence that He will teach us how to pray for this blessing. 1. "What things soever _ye desire_."--Desire is the secret power that moves the whole world of living men, and directs the course of each. And so desire is the soul of prayer, and the cause of insufficient or unsuccessful prayer is very much to be found in the lack or feebleness of desire. Some may doubt this: they are sure that they have very earnestly desired what they ask. But if they consider whether their desire has indeed been as whole-hearted as God would have it, as the heavenly worth of these blessings demands, they may come to see that it was indeed the lack of desire that was the cause of failure. What is true of God is true of each of his blessings, and is the more true the more spiritual the blessing: "Ye shall seek Me, and shall find, when ye shall search for Me with all your heart" (Jer. xxix. 13). Of Judah in the days of Asa it is written, "They sought Him with _their whole desire_" (2 Chron. xv. 15). A Christian may often have very earnest desires for spiritual blessings. But alongside of these there are other desires in his daily life occupying a large place in his interests and affections. The spiritual desires are not all-absorbing. He wonders that his prayer is not heard. It is simply that God wants the whole heart. "The Lord thy God is _one Lord_, therefore thou shalt love the Lord thy God with _all thy heart_." The law is unchangeable: God offers Himself, gives Himself away, to the whole-hearted who give themselves wholly away to Him. He always gives us according to our heart's desire. But not as we think it, but as He sees it. If there be other desires which are more at home with us, which have our heart more than Himself and His presence, He allows these to be fulfilled, and the desires that engage us at the hour of prayer cannot be granted.