You will keep him in perfect peace, whose mind is stayed on you: because he trusts in you.…
When you have a really calm sea, what rare things the placid waters reveal! Sculptured coral, whorled shells, iridescent fish, pearls — snowflakes of the deep not one moment white but white forever, gems whose strange e the floods cannot quench, with glorious plants and blossoms, as if the silver water mirrored the flowers of Heaven as well as its stars. And what rare things the unstirred sea reflects! The ambient blue, with all its treasures of light and colour; the devious coast, with all its fantasy of rock forestry and mountain. But let one ripple pass over the glassy tide, and the matchless spectacle is sadly marred. So in "perfect" peace we realise the glory of our own being, the glory of higher worlds, as no language can tell; but the first ripple of passion, or care, or doubt, spoils the magic of the picture and the joy.
(W. L. Watkinson.)
Parallel VersesKJV: Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee.
WEB: You will keep whoever's mind is steadfast in perfect peace, because he trusts in you.