Isaiah 26:3-4 AMP
You will keep in perfect and constant peace the one whose mind is steadfast [that is, committed and focused on You—in both inclination and character],
Because he trusts and takes refuge in You [with hope and confident expectation].
Trust [confidently] in the LORD forever [He is your fortress, your shield, your banner],
For the LORD GOD is an everlasting Rock [the Rock of Ages].