John 16:33 ~ I have told you these things, so that in me you may have peace. In this world you will have trouble. But take heart! I have overcome the world.
I think we can all agree that “in this world you will have trouble”. However not everyone agrees that God can give us peace because He has overcome the world.
Yes, many do not believe that God exists or choose to ignore Him. That’s why we must show those who don’t believe in God, that they too can find peace if they accept God, and give Him all their troubles.