John Piper, Desiring God, 1996, p. 153.
Love is the fruit of the Spirit (Galatians 5:22), and the Spirit is given in answer to prayer (Luke 11:13). Love is the outworking of faith (Galatians 5:6), and faith is sustained by prayer (Mark 9:24, Luke 22:32). Love is rooted in hope (Colossians 1:4-5), and hope is preserved by prayer (Ephesians 1:18). Love is guided and inspired by knowledge of the Word of God (Philippians 1:9; John 17:17), and prayer opens the eyes of the heart to the wonders of the Word (Psalms 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, Desiring God, 1996, p. 153.