How can various art forms (like paintings, sculpture, stained glass windows, songs) teach in ways that written literature can’t? ?

Answer 1

They appeal to different senses for a start.  Human beings make sense of the world through these senses.  Each comes to the problem of understanding in a different way.  Potentially offering a variety of abstract solutions or interpretations to help aid our understanding of the human condition.

Answer 2

It is the expression of the person who created the art and should be appreciated by all.