Although we need the Lord all the time, we feel the need of Him when life is difficult.
In today’s verse, David has been betrayed by someone close to him. You can feel his pain in what he writes in the rest of Psalm 55. For example, v12-13: “For it is not an enemy who taunts me – then I could bear it; it is not an adversary who deals insolently with me – then I could hide from him. But it is you, a man, my equal, my companion, my familiar friend.” This points us forward to the greatest betrayal, when Jesus Himself was betrayed by one of His own.
David’s troubles were real. They caused him deep pain. We may have different troubles to David, but they are still real and cause us pain. But today’s verse shows us what to do.
“Cast your burden on the Lord.” Give Him your circumstances. How? By prayer (ask Him to help you), faith (trusting Him to help you) and by not worrying (resting in His promises to help you instead of focusing our attention on the troubles).
Then comes the promise: “He will sustain you.” The word “sustain” means to support, strengthen and provide. This is what God does. The word is used in Nehemiah 9:21, “Forty years you sustained them in the wilderness, and they lacked nothing. Their clothes did not wear out and their feet did not swell.”
The Lord supported them through the wilderness, protected from enemies, supplied food and strength and clothing. He will sustain you through whatever troubles you have.
That is His promise. Cast your burden on Him today.