In Christianity there are many prayers of “abandonment.” These aren’t really an expression of loss of God. Soon-to-be-saint Charles de Foucauld prays of turning his whole life over to God.
Maybe it’s a stretch, but I think this is quite suitable for an early day in Advent:
I abandon myself into your hands.
Do with me what you will.
Whatever you may do, I thank you;
I am ready for all, I accept all.
Let only your Will be done in me, and in all your creatures.
I wish no more than this, O Lord.
Into your hands I commend my soul.
I offer it to you with all the love of my heart,
for I love you, Lord, and so need to give myself
to surrender myself into your hands
without reserve and with boundless confidence
For you are my Father.
Boundless confidence? That’s a quality for a real saint. Hope to obtain it someday.