The art of writing poetry is therapy. Listening to poetry can be therapeutic as well.
According to the National Association of Poetry Therapy, “poetry therapy, or poetry which is used for healing and personal growth, may be traced back to primitive man, who used religious rites in which shamans and witchdoctors chanted poetry for the well-being of the tribe or individual. It is documented that as far back as the fourth millennium B.C.E. in ancient Egypt, words were written on papyrus and then dissolved into a solution so that the words could be physically ingested by the patient and take effect as quickly as possible. It is also recorded that around 1030 B.C.E., the music of a shepherd boy named David soothed the “savage breast” of King Saul”. http://www.poetrytherapy.org/history.html
Check out some of my poetic expressions.