Isaiah 26:3

Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee. Thou wilt keep (him) in perfect peace (literally, peace, peace) (whose) mind (is) stayed - (Psalms 112:7.) Jesus can create "perfect peace" within the mind, though storms of trial rage without (Isaiah 57:19; Mark 4:39); as a city kept securely by a strong garrison within, though besieged without (so Philippians 4:7, "Keep" [froureesei] - literally, guard as with a garrison). Horsley translates, '(God's) workmanship (the Hebrew [ yeetser (H3336)] does not probably mean "mind," but 'a thing formed,' Ephesians 2:10) stayed (on thee) thou shalt preserve (namely, the righteous nation) in perpetual peace.' The righteous nation is God's workmanship, which God will stay, or support, and keep in perfect peace. Compare Isaiah 43:1, "The Lord that created thee ... and ... formed thee, O Israel." But the Chaldaic supports in the main the English version, "mind," 'heart.' Calvin takes yeetser (H3336) caamuwk (H5564), '(In thy) firm decree (or purpose) thou keepest (the Church) in perfect peace,' etc. The Church's peace does not depend on the state of the world, nor upon our wandering purposes, but upon the fixed purpose and immutable counsel of God.