Verse explainer
The word translated 'burden' literally means 'what has been assigned you' — God isn't just catching your stress, he's carrying your whole appointed lot.
Cast thy burden upon the LORD, and he shall sustain thee: he shall never suffer the righteous to be moved.
BSBCast your burden upon the LORD and He will sustain you; He will never let the righteous be shaken.
The plain meaning
Psalm 55 is a raw lament. David is not writing from a comfortable distance — he's describing betrayal by a close friend (vv. 12-14), wishing he could fly away like a dove (v. 6), and barely holding together. The instruction to 'cast' the burden comes out of that anguish, not in spite of it. The Hebrew word behind 'burden' (yehab) points to what has been given or assigned — not merely a mood or a worry, but one's whole situation and lot in life. 'Sustain' carries the sense of providing food and material need, not just emotional comfort. And 'never suffer the righteous to be moved' means never allowing them to be dislodged from the secure place of God's favor. The psalm ends with trust, but it earns that trust by first naming the suffering honestly.
The common misreading
What the commentators say
JFB notes that 'burden' translates a word literally meaning 'gift' or what is assigned you — connecting sustaining to the provision of food and every need (citing Psalm 37:25 and Matthew 6:11). Being 'moved' means being dislodged from the secure position of God's favor, not merely stumbling emotionally. The promise is therefore more total than it first appears: God undertakes the whole of what life has handed you.
Gill reads the closing verse against the full backdrop of the psalm's treachery and danger. The posture of trust — 'but I will trust in thee' — is David's answer to surrounding wickedness. Gill connects God's sustaining to supplying grace and every needful thing, and sees the promise that the righteous will not be moved as God's assurance that David will live to complete the work God has given him, then be received to glory.
Spurgeon observed that the casting is an act of will — the believer is to heave the weight off deliberately, not merely wish it gone. The verb implies a decisive throw, not a gradual setting down. The promise that follows is unconditional for the righteous: God will not allow permanent displacement. Spurgeon connected this to the experience of the Psalms broadly — honest crisis and confident trust are not opposites but companions.
The word behind it
'What is given' or 'what has been assigned' — not simply a feeling of heaviness but one's appointed lot, the whole situation life has handed you. This matters because the promise is not merely 'God will help you feel better' but 'God will carry the entire weight of what has been placed on your shoulders.' Gesenius traces it to a root meaning to give or bestow, so the burden is, paradoxically, a gift entrusted to you — and you are invited to hand it back to the Giver.
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