Love is the fruit of the Spirit (Gal. 5:22), and the Spirit is given in answer to prayer (Lk. 11:13). Love is the outworking of faith (Gal. 5:6), and faith is sustained by prayer (Mk. 9:24, Lk. 22:32). Love is rooted in hope (Colossians 1:4-5), and hope is preserved by prayer (Eph. 1:18). Love is guided and inspired by knowledge of the Word of God (Phil. 1:9; Jn. 17:17), and prayer opens the eyes of the heart to the wonders of the Word (Psm. 119: 18). If love is the path of fullest joy, then let us pray for the power to love “that our joy might be full!”
John Piper