We pray because…of God Himself, His promises, our joy
“God has of His own motion placed Himself under the law of prayer, and has obligated Himself to answer the prayers of men. He has ordained prayer as a means whereby He will do things through men as they pray, which He would not otherwise do. . . If prayer puts God to work on earth, then, by the same token, prayerlessness rules God out of the world’s affairs, and prevents Him from working.” 
Those words perfectly communicate the importance of God’s people praying. Prayer is no light thing, yet at the same time it is simple communication between the Father God and His children, and as E.M. Bounds said in his book Purpose in Prayer:
“The driving power, the conquering force in God’s cause is God Himself. ‘Call upon Me and I will answer thee and show thee great and mighty things which thou knowest not,’ is God’s challenge to prayer. Prayer puts God in full force into God’s work.” 
Let us then receive His challenge and engage ourselves in a life of fervent prayer. For “the effective, fervent prayer of a righteous man avails much” (James 5:16).
Why Should We Pray?
Pray because God tells you to.
What more reason do we need? It’s a command that we are given over and over again. Luke 18:1 says, “Then He spoke a parable to them, that men always ought to pray and not lose heart.” Philippians 4:6 says, “Be anxious for nothing, but in everything by prayer and supplication, with thanksgiving, let your requests be made known to God.” Ephesians 6:18 also instructs us to pray. Pray about everything, small things, big things and all things. “Pray without ceasing” (1 Thessalonians 5:17).”
Pray because God has promised to answer.
If you want to see things accomplished, ask. God says, “Yet you do not have because you do not ask” (James 4:2). . . . Are there dreams and visions you want fulfilled? You can talk about it all you want, but it won’t happen unless you ask. Without prayer, nothing of lasting value is going to happen.”
God delights in answering the prayer of faith. The last part of Hebrews 11:6 says, “He is a rewarder of those who diligently seek Him.” In Matthew 7:7 Jesus said, “Ask, and it will be given to you; seek, and you will find; knock, and it will be opened to you.” John 15:7 says, “If you abide in Me, and My words abide in you, you will ask what you desire, and it shall be done for you.” We are given this promise over and over again in Scripture. God answers prayer.”
Cornelius, a Gentile, prayed, and God sent Peter to talk to him (see Acts 10:1–2). God is eager to answer our cries for help.”
Elijah was a man, weak like all of us (see James 5:17). Yet he prayed that there would be no rain, and for three and a half years there was a drought. Then he prayed for rain, and a storm came.”
Daniel prayed, stood firm in his God and saw the victory (see Daniel 9).”
From the belly of the fish Jonah prayed, and God heard him (see Jonah 2:1). Hagar prayed. Moses prayed. God answered them. I think also about people that I know. Our own experiences tell us that God really does answer prayer.
Let me tell you a story from the village in which I was born and raised. One particular year, the entire rice crop was failing. It was a disastrous year for our community. But there was one believer who really trusted the Lord. When the rice crops began to fail, he said, “I belong to the Lord. My field belongs to the Lord. I know the entire community is facing this problem, but I trust my God to take care of my crops.” He fasted and prayed; amazingly, God did a miracle that no one could explain. In the midst of thousands of acres of failing rice fields, his five or ten acres were protected.
Week after week at Gospel for Asia headquarters, we read letters from people who write to us saying, “Would you please pray for this?” We get prayer requests from all over, and we take these requests seriously and pray. Later we hear the praise reports: “Nobody can explain how it happened, but God answered prayer . . . The money that we needed came in . . . We found the perfect individual to do the work . . . The Lord healed him.” All kinds of unbelievable things happen when people pray.
Pray because major events must transpire in our lifetime.
The work’s forward progress depends on our praying. It really does. Let this sink in. God really answers prayer. As you ask Him, He answers specifically and miraculously. I have seen it so many times.
God wants things to happen.
Prayer is a sure way to see God do miracles on our behalf. Gideon, Moses, Daniel, Elijah and Paul all prayed, and things happened. Jesus prayed before He raised Lazarus from the dead and before He fed the five thousand. The Bible is filled with people praying and things happening in answer to those prayers. Right now God is waiting to answer the prayers from your lips. Sometimes the answer may take longer in coming, but keep on asking. Keep on seeking. Keep on knocking. God truly answers prayer.
Pray so that your joy may be full.
In John 16:24 Jesus said, “Until now you have asked nothing in My name. Ask, and you will receive, that your joy may be full.”
Do you want to be full of joy? Then let God show you some answers to prayer. All of us can testify to the joy of answered prayer. When our children were growing up, we encouraged them to pray for their needs. One time my son, Daniel, was praying for a particular pair of tennis shoes. A stranger who knew nothing about this prayer bought the exact shoes that Daniel was praying for and gave them to him as a gift. Imagine the joy and the thrill of a young heart experiencing God’s answer to prayer! So it is with us as adults too.
Pray because it is the best cure for worry and concerns.
When we pray, we leave the matter in God’s hands and are free from worry and concern.
Someone once said, “Why pray when you can worry about it?” But Philippians 4:6–7 says, “Be anxious for nothing, but in everything by prayer and supplication, with thanksgiving, let your requests be made known to God.” God has given us the invitation to cast all our cares upon Him, for He cares for us (see 1 Peter 5:7). What is bothering you? Please, just pray. When you are troubled about anything, pray.
Pray because it makes our God happy.
Hebrews 11:6 tells us, “Without faith it is impossible to please Him.” It brings joy to the heart of God when we turn to Him in prayer, depending on Him to move in the circumstances of our lives.
 E.M. Bounds, The Complete Works of E.M. Bounds on Prayer, p. 375.
 Ibid., p. 309.
Excerpted from Learning to Pray by KP Yohannan. Copyright © 2004 by KP Yohannan. (Wills Point, TX: GFA Books).
To read more posts on Patheos by Dr. KP Yohannan Metropolitan on how we should pray because of God’s command and promises, go here.
Dr. KP Yohannan, founder and director of the nonprofit organization Gospel for Asia, has written more than 200 books, including Revolution in World Missions, an international bestseller with more than 4 million copies in print. He and his wife, Gisela, have two grown children, Daniel and Sarah, who both serve the Lord with their families.
Gospel for Asia is a nonprofit organization serving the “least of these” in Asia since its beginning in 1979, often in places where no one else is serving. Gospel for Asia supports national workers who are serving as the hands and feet of Christ by ministering to people’s needs so they can understand the love of God for them for the first time. Gospel for Asia is engaged in dozens of projects, such as caring for poor children, slum dwellers and widows and orphans; providing clean water by funding wells; supporting medical missions; and meeting the needs of those in leprosy colonies. Through Gospel for Asia’s Bridge of Hope Program, tens of thousands of children are being rescued from the generational curses of poverty and hopelessness.
Click here, to read more articles on Patheos by Dr. KP Yohannan Metropolitan.