When Jesus answered the rich young man’s question about entering the kingdom of God, he said to sell everything and follow him. The disciples were astonished, and ask Jesus “Who then can be saved? But Jesus looked at them and said, With man this is impossible, but with God all things are possible.” Salvation is a gift from God, not something man can achieve.
David experienced this need for God’s involvement in his life on a number of occasions. Pretending to be mad in front of Achish, king of Gath, was one such occasion. He wrote Psalm 34 about the experience, and the need to rely on God. “This poor man cried, and the LORD heard him and saved him out of all his troubles … Blessed is the man who takes refuge in him”. He concludes the Psalm with “The LORD redeems the life of his servants; none of those who take refuge in him will be condemned.”
We have been redeemed by God’s work alone. He has provided for us, and will hear when we call. No problem is too great, with God all things are possible.