"Therefore I say to you, whatever things you ask when you pray, believe that you receive them, and you will have them." Mark 11:24
By the words "believe that you receive them": we understand, expect God to give them to you. But it is at this point that so many of God's people fail oftenest in their prayer-lives. There are three chief things to be attended to in prayer.
FIRST, make sure that you are asking for something which is in accordance with God's Word: see 1 John 5:14. But right here the Devil will foil you unless you are upon your guard. He will come as an "angel of light" and preach a sermon to you on submission to God's holy will. O yes, the Devil is quite capable even of that! It is our privilege and duty to know what God's will is! "Wherefore be you not unwise, but understanding what the will of the Lord is" (Ephesians 5:17). It is the REVEALED WILL of God which is in view in these passages, for with His "SECRET" will we have nothing to do; that is none of our business God's revealed will is made known in His WORD. Fix this in your mind, and never allow Satan to inject a thought (Ephesians 4:27) to shake you thereon, that everything God has commanded you to do, every precept and exhortation addressed to you, is "GOD'S WILL" for you, and is to be turned into prayer for enabling grace. It is God's will that you should be "sanctified" (1 Thessalonians 4:3), that you should "rejoice" (Philippians 4:4), that you should "make your calling and election sure" (2 Peter 1:10), that you should "grow in grace and in the knowledge of the Lord" (2 Peter 3:18).
SECOND, having made sure that what you are praying for is according to God's revealed will, then PLEAD His promises, such as Matthew 7:7, Philippians 4:19, etc. Plead them in the Name of Christ, asking God to give you the "desires of your heart" (Psalm 37:4) for Christ's sake, that HE may be honored in and by a godly walk from you, and that His people may be helped and encouraged by your example. Those are "pleas" which God cannot deny.
THIRD, and this is what we would earnestly and lovingly press upon the Christian reader: EXPECT God to do as you have asked. Unless there is this expectancy, faith is not fully in exercise. It is this expecting from Him which honors and pleases God, and which always draws down from Him answers of peace. There may be some difficulty, problem, trial, looming ahead of you, which assumes the proportions of a mountain. Never mind that: do not let it depress, discourage, or dismay you. Praise God it stands written in the eternal WORD OF TRUTH, "Truly I say unto you, If you have faith and doubt not... you shall say unto this mountain be you removed, and be you cast into the sea; It shall be done" (Matthew 21:21).
Notice carefully that it is not "If you doubt not and have faith," but "If you have faith" and then (while you are awaiting God's answer) "doubt not," but continue to expect the fulfillment of His promise. When you first get down on your knees beg God in the name of Christ and for His own glory's sake, to work in you by His Spirit that expectancy of faith which will not take "NO" from Him; which reverently but confidently says, "I will not let You go, except You bless me" (Genesis 32:26). That is what honors God, that is what pleases Him, that is what obtains answers from Him. "A friend at court!" No doubt that expression is more or less familiar to the older readers, but it has almost dropped out of use in this generation. It denoted that one had a friend possessing influence with another in authority, and using it on my behalf. How unspeakably blessed to know that the Christian has a Friend at Court, the Court of Heaven; "A Friend that sticks closer than a brother." He has the ear of God, for on earth He declared "You hear Me always" (John 11:42). Then, make use of Him, fellow saints. Bring your petitions to Him, and ask Him to present them to His Father and your Father, accompanied by His own all-prevailing merits; and, if they are for God's glory and your (real) good, be fully assured that they shall be granted. Thus will Christ be honored and your faith strengthened.