Pastor John examines Psalm 147:11: but the Lord takes pleasure in those who fear him, in those who hope in his steadfast love.
The reason our hope is a pleasure to God is because it shows that all our joy comes from the bounty of his grace. And the reason our prayers are a pleasure to God is because they express this God-exalting hope. It is a precious thing beyond all words – especially in the hour of death – that we have a God whose nature is such that what pleases him is not our work for him but our need of him.
John Piper, The Pleasures of God: Meditations on God’s Delight in Being God, pp. 215-216.