You will keep him in perfect peace, whose mind is stayed on you: because he trusts in you.…
A ship is made to go in the water, and no matter how deep the sea nor how wild the tempest, all goes well so long as the water does not get into the ship. The problem of managing a ship is, not to keep the ship out of the water, but to keep the water out of the ship. The problem of true Christian living is, not to keep ourselves out of cares and trials and temptations, but to keep the cares and temptations from getting into our souls.
(J. R. Miller, D. D.)
Parallel VersesKJV: Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee.