A common—but only partly correct—idea about prayer is that its purpose is to get things from God and to change His mind regarding the course of events. As John says, if we ask according to His will, He hears, but it is in the other part where misunderstanding lies.
Answer this: Is our idea of God nothing more than that of a greater human parent? Perhaps few will admit to this, but it is nonetheless a reality. God the Father undoubtedly relates to us like a parent, and Jesus tells us to think of Him and address Him as our Father. So far, so good.
Now we must ask: What should a Father be like? We run into trouble here because all our examples of fathers are human, and every human father has been deficient in many ways. We are now dealing with a flawless Father, perfect in every way. He is eternal, perfect in wisdom, knows the end from the beginning, has unimaginable power, and does absolutely everything out of love. He does everything for the perfection and completion of His purpose, whether for us individually or for what He is working out universally.
We need to consider Isaiah 40:13-14 in relation to prayer:
Who has directed the Spirit of the LORD, or as His counselor has taught Him? With whom did He take counsel, and who instructed Him, and taught Him in the path of justice? Who taught Him knowledge, and showed Him the way of understanding?
Now we must add a few thoughts from Psalm 139:1-7:
O LORD, You have searched me and known me. You know my sitting down and my rising up; You understand my thought afar off. You comprehend my path and my lying down, and are acquainted with all my ways. For there is not a word on my tongue, but behold, O LORD, You know it altogether. You have hedged me behind and before, and laid Your hand upon me. Such knowledge is too wonderful for me; it is high, I cannot attain it. Where can I go from Your Spirit? Or where can I flee from Your presence?
Considering these scriptures, is there anything—anything!—we can tell Him that He does not already know? Is there anything about our lives that He has not already thoroughly considered in light of what He wants to produce for our good? All too often our attitude in prayer about something emphasizes what we feel is our or somebody else's need rather than focusing on God's will. Which is more important: what this perfect, great God considers from His perspective or what we desire from our position of nearly blind ignorance of what is really needed?
Jesus says in Matthew 6:8: "Therefore do not be like [the hypocrites]. For your Father knows the things you have need of before you ask Him." This verse leads into the model prayer, indicating that we should not pray with the idea that we are bringing something new to God. It also introduces the thought that the purpose of prayer is not to overcome God's reluctance to answer and give but rather to lay hold of His willingness to help us toward His perspective, the fulfillment of His purpose, and into His Kingdom. The overall emphasis in our requests, then, must be inclined toward His purpose and will.