I recall the story of a little girl who, when trains were popular transportation, was taking her first train ride with her parents. As night descended, the mother took the girl, who was clearly quite anxious, and placed her on the upper bunk of the sleeper. She told her little one that up there she would be nearer to God and that God would watch over her.
As silence enveloped the young lady she became afraid and called softly, "Mommy, are you there?"
"Yes dear," came the response.
A little later, in a louder voice, the child called, "Daddy, are you there, too?"
"Yes dear," was the reply.
After this had been repeated several times one of the passengers sharing their sleeper car finally lost his patience and shouted loudly, "Yes, we're all here, your father, your mother, your brother, and all your aunts and cousins; now settle down and go to sleep!"
There was a moment of silence and then, in hushed tones a little voice asked, "Mommy, was that God?"
Jesus, in offering peace, does not say, "I'm here, the Holy Spirit's here and God is here, now be at peace!" The peace that Jesus offers cannot be had simply by desiring. The peace of God is a gift, it can only be received as a by-product of faith. That's why the world is largely a stranger to it.