God does not promise to lift the burden away
(J.R. Miller, "Intimate Letters on Personal Problems" 1914)
An old Scripture promise reads, "Cast your burden upon the Lord — and He shall sustain you." Psalm 55:22. Every burden you have, you may cast on the Lord; that is, you may lay it on Him in prayer and by faith. But notice that God does not promise to lift the burden away — all He promises is to sustain you, that is, to give you strength to do the work, to bear the burden, to meet the difficulty, to master the hindrance or the obstacle.