"For this reason I bow my knees to the Father of our Lord Jesus Christ, from whom the whole family in heaven and earth is named, that He would grant you, according to the riches of His glory, to be strengthened with might through His Spirit in the inner man, that Christ may dwell in your hearts through faith; that you, being rooted and grounded in love, may be able to comprehend with all the saints what is the width and length and depth and height; to know the love of Christ which passes knowledge; that you may be filled with all the fullness of God. (vv.15-19).
The basis of Paul’s prayer was his knowledge of God’s purpose. This means he confidently prayed according to God’s will. We can’t pray effectively if we do not have insight into God’s purpose and will. Our text records that Paul prayed in the posture of bowing his knees. This position of utmost humility was in contrast to the more normal posture of prayer in that culture, to pray standing with hands raised up.
While scripture records that Solomon prayed on his knees (1 Kings 8:54). Ezra prayed on his knees (Ezra 9:5). The Psalmist called us to kneel (Psalm 95:6). Daniel prayed on his knees (Daniel 6:10). People came to Jesus kneeling (Matthew 17:14, Matthew 20:20, and Mark 1:40). Stephen prayed on his knees (Acts 7:60). Peter prayed on his knees (Acts 9:40). Paul prayed on his knees (Acts 20:36), and other early Christians prayed on their knees (Acts 21:5). Most importantly, Jesus prayed on His knees (Luke 22:41). So does one need to be kneeling when praying? No. The Bible has enough prayer not on the knees to show us that it isn’t required, but it also has enough prayer on the knees to show us that it is good.
Paul directed his prayer to the Father, who is presented as the “planner” among the members of the Trinity. In the Bible, prayer is usually directed to the Father, through the Son, by the empowering and direction of the Holy Spirit. In remembering that all God’s family is called after His name, Paul showed that his mind was rather taken with this idea of the essential unity of the Body of Christ. God is Father of both Jew and Gentile.
In his prayer Paul asked that they (the church) would be strengthened with might, and that the strength would be according to the riches of His glory (a most generous measure). He also prayed that the strength would come through the Holy Spirit and that it would be put into their inner man. Paul asked that Jesus would live in these believers, even as Jesus promised in John 14:23: If anyone loves Me, he will keep My word; and My Father will love him, and We will come to him and make Our home with him. And that they would be rooted and grounded in love. The meaning seems to be that they should be rooted and grounded in their love for one another, more than being rooted and grounded in their love for God and the knowledge of that love.
In his pyayer Paul goes on to request that they be able to, comprehend with all the saints what is the width and length and depth and height; to know the love of Christ which passes knowledge; that you may be filled with all the fullness of God. In other words, Paul asked that they might be able to understand together in community every dimension of the love of Jesus. Paul wanted them to know it by experience and not just in words. This isn’t speculation, guesswork, emotions, or feelings. This is something we can know.
Finally Paul asked God to fill these Christians unto all the fullness of God. The word unto is a better translation than the word with. Paul wanted Christians to experience life in Jesus Christ, the fullness of God (Colossians 2:9), and to be filled to their capacity with Jesus, even as God is filled to His own capacity with His own character and attributes. “Among all the great sayings in this prayer, this is the greatest. To be FILLED with God is a great thing; to be filled with the FULLNESS of God is still greater; but to be filled with ALL the fullness of God utterly bewilders the sense and confounds the understanding.” (Clarke)
The Truth: "For God so loved the world that He gave (us) His only begotten Son, that whosoever believes in Him should not perish but have eternal life." (John 3:16)