Scripture starts with the particular and then universalizes it. You are called to love your concrete individual neighbor and then to realize that every individual is your neighbor. The point is not to destroy concrete neighborhood in a fit of universalism but to expand the local neighborhood and embrace the universal neighborhood.
Peter KreeftNow if the religious skeptic is right, we can know nothing about God. And if we can know nothing about God, how can we know God so well that we can know that he cannot be known? How can we know that God cannot and did not reveal himself—and perhaps even through human reason?
Peter Kreeft