The LORD redeemeth the soul of his servants: and none of them that trust in him shall be desolate. The Lord redeemeth - Both the life and soul of God's followers are ever in danger but God is continually redeeming both.
Shall be desolate - Literally, shall be guilty. They shall be preserved from sin, and neither forfeit life nor soul. This verse probably should come in after the fifth. See the introduction to this Psalm.
Commentary on the Bible, by Adam Clarke [1831].