The beauty of God is a deeply unfashionable topic in theological circles. Most Protestant systematic theologies do not mention God's beauty when covering the divine attributes.
Why should a Christian believe that God is beautiful? The Scriptures testify to God's beauty, cf., e.g. Psalm 27.4: 'One thing I ask of the LORD, this is what I seek: that I may dwell in the house of the LORD all the days of my life, to gaze upon the beauty of the LORD and to seek him in his temple.' Or cf. Psalm 90.17: 'May the beauty of the Lord our God rest upon us.'
Many of the modern hymns and songs of the Christian tradition talk of the beauty of God. If one accepts that God is an absolutely perfect being, then one should ascribe to God every perfection. It certainly seems to me that beauty is a perfection. Hence I think one should ascribe beauty to God.
