“You keep him in perfect peace whose mind is stayed on you, because he trusts in you. Trust in the LORD forever, for the LORD GOD is an everlasting rock.” (Isaiah 26:3–4 ESV)

Perfect peace is supplied to those whose minds are “stayed” on God and TRUST in Him alone!  He is an unmovable Rock.  What are we trusting in?  Our own self salvation or the eternal God that reigns on high?  God will humble those who trust in their own self sufficiency.  “For he has humbled the inhabitants of the height, the lofty city. He lays it low, lays it low to the ground, casts it to the dust.” (Isaiah 26:5 ESV)  Trust in God!