'My darling' is a poetic term for 'my precious one' — the soul. The psalmist asks God to rescue the most precious thing — his very life and soul — from destructive power. Jesus was rescued from the power of death by the resurrection.
Memory phrase: God rescues what is precious to Him — and I am precious.
Talk about it: What does God consider 'precious' and worth rescuing? (Hint: you.)
Prayer: God, You rescued Jesus' soul from the power of death. Thank You for rescuing me too.