Prayer is communion with God. It is an act of worship; it acknowledges who God is and who we are. Prayer is earnestly asking God for our needs, confessing our sins to Him, and thanking the Lord for His blessings. Prayer acknowledges that all benefits received are for Christ's sake, not for our own, as we are unworthy sinners.
The Shorter Catechism answers the question, "What is prayer?" as follows:
"Prayer is an offering up of our desires unto God for things agreeable to His will, in the Name of Christ, with confession of our sins, and thankful acknowledgment of His mercies."
Prayer is an expression of heartfelt love for God. If a person loves another, he loves to be in that person's presence, to talk and commune with that person. This is also true when a person loves God. He then loves to talk and commune with God; he loves to pour out the fullness of his heart unto the Lord.
In everything by prayer and supplication with thanksgiving let your requests be made known unto God.
- Philippians 4:6b
And this is the confidence that we have in Him, that, if we ask any thing according to His will, He heareth us.
- I John 5:14
And I say unto you, Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you.