ISAIAH 26 : 3
“You will keep him in perfect peace, whose mind is stayed on You, because he trusts in You.”
Shalom repeated twice shows intensity or perfect peace that the Lord gives. It is a matter of the mind and not the heart; a deliberate decision and not an emotional step.
The peace of the wicked is an illusion and temporary. It is about trust in the right Source, the Lord.
This is a gift to the faithful who believe and then receive!