Counselors often encourage their clients to write out their feelings, particularly when clients have a difficult time verbally expressing their feelings. Counselors understand that something occurs in the writing process that is cathartic in nature and catalytic in results.
What is this something? I believe it is the point of intersection between the conscious and the subconscious mind. Writing somehow bridges that intersection, causing buried emotions to surface to the place of light where we can recognize them for what they are and then deal with them.
To this end, it is valuable to keep a journal. Many Christian writers journal as a means of communing with God. I personally have journaled for years and find that journaling is one of the the major ways in which I hear God. Journaling also provides me with a place in which I can pour out my heart and present it to God for His healing touch, His comfort, and His direction.
Writing as therapy is a very powerful tool that can be misused. Use it in the proper place and in the proper way. What you write for therapy should usually not be written for publication.
On another note, my flower garden is bursting with the brilliant colors of tulips and daffodils. Here are a few photos I thought you might enjoy.