Whether it is the arrangement of sound, colour, shapes, numbers, words, or ideas, beauty is found in the combination and arrangement of disparate parts to make a unified whole. Whether found naturally, or re-shaped by God’s image-bearers, created beauty is a re-enactment of Genesis 1:2-3: order, harmony, equality is brought to bear upon what is without form and void, so that we can make the evaluation: “it is good.”
Beauty defined may be abstract and remote; beauty described should be concrete. What does beauty look like? For that matter, since beauty is not only (or even primarily) visual, what does beauty sound like, feel like, or seem like? When we have encountered or experienced beauty, what is that experience?
The best approach is to start from the deepest reality and work outwards. If beauty is the ultimate ground of reality, the self-giving love of the Godhead to one another, then beauty in the created order will be a form, or an echo of that primary beauty.
Among rational, sentient beings, this beauty is seen in self-giving love. When free beings choose to willingly unite their wills with the good of others, this is the closest echo of Trinitarian beauty. Symmetry of wills is the greatest symmetry of all. No wonder that the Greatest Commandment is to love God wholeheartedly (unite our wills entirely with His glory), and the Second is like it, to love our neighbour as oneself (unite our wills with what will beautify and bless our neighbour). Those who live in this kind of love are simultaneously growing in knowledge of truth and goodness (Phil. 1:9-11). Furthermore, the more they pursue this beauty, the more they are “beautified” by it, and become rooted and grounded in, enabling even further knowledge of it (Ephesians 3:16-19). And when this is the case, the soul being shaped into the beauty of God finds ultimate pleasure and joy in knowing and loving God (Ps 34:4). Harmony, symmetry, pleasure, truth and goodness (all the suggested definitions of love) find their manifestation in God’s love, considered objectively or subjectively.