You keep him in perfect peace whose mind is stayed on you
To achieve the "perfect peace" spoken of by the prophet Isaiah, we must understand what it means to “stay one’s mind on God.” In Isaiah 26:3, "You keep him in perfect peace whose mind is stayed on you, because he trusts in you," the phrase "stayed on you" implies a steadfast, unwavering focus and trust in God. It is more than just occasional thoughts about God; it is a deliberate and continuous mental posture that centers on who God is — His character, His promises, His purposes, and His presence.