16 I pray that out of His glorious riches He may strengthen you with power through His Spirit in your inner being, 17 so that Christ may dwell in your hearts through faith. And I pray that you, being rooted and established in love, 18 may have power, together with all the Lord’s holy people, to grasp how wide and long and high and deep is the love of Christ, 19 and to know this love that surpasses knowledge—that you may be filled to the measure of all the fullness of God.
Such an interesting prayer here. It begins with 14 For this reason I kneel before the Father, 15 from whom every family in heaven and on earth derives its name. These verses make it clear Paul is praying to our Heavenly Father and it is His glorious riches that are referenced in verse 16.
Then He wants us to be strengthened by the power of His Holy Spirit in our inner being. And being strengthened by the Holy Spirit so that Christ may dwell in our hearts through faith. So here we have the trinity, the Father giving the Holy Spirit in our inner being and Christ dwelling in our hearts – all as a result of and through our faith.
As a result of Christ indwelling in our hearts, we are then rooted and established in love. It is the love of Christ that is the root and foundation and it is in this love we are rooted and established so that growth takes place.
The growth is deeper and deeper into a unity with God’s will in Christ via the wide and long and high and deep love of Christ. Ellicott’s Commentary tells us
love is the first consequence of the indwelling of Christ in the soul; and by it the soul becomes rooted and grounded in the unity, given by that indwelling, with man and God.
Paul ends this part of the prayer with how he wants us to know this love [Christ’s love] that surpasses knowledge—that you may be filled to the measure of all the fullness of God. This then is the consequence of the indwelling of Christ in our hearts. What happens when we are filled with the fullness of God is described in 2 Corinthians 3:18 And we all, who with unveiled faces reflect the Lord’s glory, are being transformed into His image with ever-increasing glory, which comes from the Lord, who is the Spirit. And also in 1 John 3:2b When He shall appear, we shall be like Him; for we shall see Him as He is.
Paul concludes his prayer with
20 Now to Him who is able to do immeasurably more than all we ask or imagine, according to His power that is at work within us, 21 to Him be glory in the church and in Christ Jesus throughout all generations, forever and ever! Amen.
All that takes place within and through us is due to the power of God and is a result of Christ dwelling in our hearts through faith. And our faith is a result of the Free Gift of Grace through His Son, our Lord and Savior, Jesus Christ. Undeserved Grace given freely to one and all as Jesus told Nicodemus in John 3
16 For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. 17 For God did not send his Son into the world to condemn the world, but to save the world through him. 18 Whoever believes in him is not condemned, but whoever does not believe stands condemned already because they have not believed in the name of God’s one and only Son.