You will keep him in perfect peace, whose mind is stayed on you: because he trusts in you.…
There are two hindrances to a steady mind.
1. The loving of unlawful things.
2. The loving of lawful things with inordinate affection.
(J. Summerfield, M. A.)
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.