There are lots of translations these days; few different words. Close to the same meanings. But I really like the my Life Application Bible translation of the same verse:

Big difference between 'wants' and 'needs'! What I might 'want', doesn't necessarily match what I 'need'.

Bible Commentary on Psalm 23:1 - "In describing the Lord as a shepherd, David wrote out of his own experience because he had spent his early years caring for sheep. Sheep are completely dependent on the shepherd for provision, guidance, and protection. The New Testament calls Jesus the Good Shepherd, the great Shepherd, and the head Shepherd. As the Lord is the Good Shepherd, so we are His sheep--not dumb, frightened, passive animals, but obedient followers wise enough to follow one who will lead us in the right places and in right ways. This psalm is not to focus on the animal qualities of sheep, but the discipleship qualities of those who follow. When we recognize the Good Shepherd, we can choose to follow Him!"

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