Thomas Moore, in his 12th book Dark Nights of the Soul, explains Beauty best. He describes how the spiritual practice of beauty can be an avenue for transformation...
"Beauty feeds the soul, wakens it, and brings it to life as nothing else can. Beauty is a deep-seated reaction to some meaningful and stunning presentation of life. It stops you and gives you an instant promise of pleasure. But if you have no soul, you won't even see the beautiful in the thick layers of your practicality and in the density of your own ego. All your senses and your full imagination have to be alert when beauty makes its appearance. "
"… The beauty of a thing is its depth and meaning being revealed. To perceive that beauty, you need an eye for both appearances and for the invisible radiance of a thing. You also need the capacity to be affected. But many people walk through life defended against all positive influences. They are not open to the invitations and messages coming at them at every turn. They wonder why life feels empty and meaningless, when the problem is not the absence of meaning but their blindness and deafness to it. . . .”
"Beauty nurtures the soul by serving the spirit. Beauty takes you out of your cramped, merely personal worries and sets you down in a field of eternity. The essence of spirituality is an enlargement of vision. The experience may only last a moment, but in these matters a moment is [just] enough. You need a transcendent sense of things, not one that lets you escape from your situation but one that gives you an added perspective. In this, beauty and religion serve similar purposes, and so it's no wonder that they are so often allied.”