Isaiah 26:3

3“You will keep in 26:3 Lit peace, peace, a Hebrew idiom of emphasis.perfect and constant peace the one whose mind is steadfast [that is, committed and focused on You—in both 26:3 The Hebrew word for inclination became a technical term in Jewish tradition, and the rabbis frequently referred to the “evil inclination” much in the same sense as the sin nature. They also recognized a “good inclination,” which the righteous choose to follow, and urged people to make their good inclination king over the evil inclination.inclination and character],

Because he trusts and takes refuge in You [with hope and confident expectation].