Psalms 108:1
1My heart is steadfast, God. I will sing and I will make music with my soul.
My heart is steadfast, God. I will sing and I will make music with my soul. Wesley (Ps 57/108): Fixed—in a stedfast belief of thy promises. Glory—with my tongue. The whole self is summoned to praise; steadiness is not a shrug but a resolved trust that sings.
Grace enables a fixed heart; the singer still takes up melody with all his being. Shared piety—both camps want a heart that does not waver when praise is costly. The difference is only how tightly that steadfastness is tied to promised enabling versus to God’s preserving decree.
Calvin (on the parallel): the heart prepared to praise is a fixed resolve under God’s promise, not a mood that waits for ease. Singing with one’s glory is employing every power God has given for His renown.
Steadfastness is God’s gift sustaining the singer; praise rises because the heart has been prepared. The church does not manufacture resolve; she receives it and then sings.