First, we embrace the truth that not only our joy in God, but also the fight for joy itself is a gift of God. In other words, God works in us to enable us to fight. Embracing this truth prevents us from thinking that the joy we fight for is ultimately our achievement. Joy remains a gift and continues to be spontaneous, even though we ourselves are engaged in its cause.
– Piper, John; When I Don’t Desire God: How to Fight for Joy; copyright 2004; Crossway Books; Wheaton, Il.; p. 41