To love my neighbor is to assist the arising and the unfolding in him of that which can harmonize the real elements of his nature ... But clearly the manifestation of Christian love, so defined, is possible only to the degree that a man has transmitted the truth to the whole of himself—the degree, that is to which he has realized in himself what was once called "self-mastery," the activation of the ruling principle, or soul, within oneself.

Here is a definition of love that gives it the central place in the Spiritual Journey that we know it must have. But here also is the greatest challenge we face on this journey.