Peace is in knowing who God is, the result of having built a firm foundation on His Word and believing that He is faithful to perform all that He has promised to do toward those who love Him.
Peace is not an emotion, it is not an act of the will, it is not a state of mind.
Peace is not a physical force that can be imparted to another through a spoken word.
Peace is the gift of God to those who believe.
Jesus did not just say “peace”. He said “My Peace“.
John 14:27 Peace I leave with you, My peace I give to you; not as the world gives do I give to you. Let not your heart be troubled, neither let it be afraid.