4. Asking in accordance with His will. Our motives must be godly: we must not seek any gift of God to consume it upon our own lusts. (1 John v. 14; James iv. 3.) 5. Importunity in supplication. There must be waiting on God and waiting for God, as the husbandman has long patience to wait for the harvest. (James v. 7; Luke xviii. 1-10.) The importance of firmly fixing in mind principles such as these cannot be overstated. The first lays the basis of all prayer, in our oneness with the great High Priest. The second states a condition of prayer, found in abandonment of sin. The third reminds us of the need of honouring God by faith that He is, and is the Rewarder of the diligent seeker. The fourth reveals the sympathy with God that helps us to ask what is for our good and His glory. The last teaches us that, having laid hold of God in prayer, we are to keep hold until His arm is outstretched in blessing. Where these conditions do not exist, for God to answer prayer would be both a dishonour to Himself and a damage to the suppliant. To encourage those who come to Him in their own name, or in a self-righteous, self-seeking, and disobedient spirit, would be to set a premium upon continuance in sin. To answer the requests of the unbelieving would be to disregard the double insult put upon His word of promise and His oath of confirmation, by persistent doubt of His truthfulness and distrust of His faithfulness. Indeed not one condition of prevailing prayer exists which is not such in the very nature of things. These are not arbitrary limitations affixed to prayer by a despotic will; they are necessary alike to God's character and man's good. All the lessons learned in God's school of prayer made Mr. Muller's feelings and convictions about this matter more profound and subduing. He saw the vital relation of prayer to holiness, and perpetually sought to impress it upon both his hearers and readers; and, remembering that for the purpose of persuasion the most effective figure of speech is _repetition,_ he hesitated at no frequency of restatement by which such truths might find root in the minds and hearts of others. There has never been a saint, from Abel's day to our own, who has not been taught the same essential lessons. All prayer which has ever brought down blessing has prevailed by the same law of success--_the inward impulse of God's Holy Spirit._ If, therefore, that Spirit's teachings be disregarded or disobeyed, or His inward movings be hindered, in just such measure will prayer become formal or be altogether abandoned. Sin, consciously indulged, or duty, knowingly neglected, makes supplication an offence to God. Again, all prayer prevails only in the measure of our real, even if not conscious, unity with the Lord Jesus Christ as the ground of our approach, and in the degree of our dependence on Him as the medium of our access to God.