By these things... — i.e., by the word of God and the performance which fulfils it. For “in all these things,” read wholly through them. The words remind us of Deuteronomy 8:3, “Man doth not live by bread alone ...”
Related Commentaries of Isaiah 38:16
Isaiah 38:16
16 O Lord, by these things men live, and in all these things is the life of my spirit: so wilt thou recover me, and make me to live.