If we are aware that we were one within God, we can feel a sense of unity with each other. Otherwise, there is no foundation for unity. Thus we can see that an awareness of God's existence is absolutely necessary to realize the ideal world. Since God is invisible many people don't believe He exists. We can explain God to such people in the following way.
All men search for happiness.
Whether atheist or believer, everyone is searching for happiness. But no matter how hard we try, it is impossible to establish the ideal based on the supposition, God doesn't exist. Men revert to being animals if there is no God. Since animals have neither conscience nor reason it would be a world in which people try to fulfill their desires by force, no more than that. God is the source of conscience and reason.