Once the realization is accepted that even between the closest human beings infinite distances continue, a wonderful living side by side can grow, if they succeed in loving the distance between them which makes it possible for each to see the other whole against the sky.

This quote suggests that even between the closest humans, there will always be an infinite distance between them. However, if both individuals accept this distance and learn to love it, it can actually strengthen their bond. The idea is that by respecting the distance between them, they are able to see each other fully and appreciate their individual qualities. In the end, a wonderful relationship can grow out of accepting the distance.