Religious message to be taken personally and seriously
See music / rhythm and sing
1. A need or desire to communicate needs and aspirations, often to friends.
2. A connection, communication with the unconscious mind.
3. Success and contentment over well-completed projects.
If you dream of a church hymn, then you are expressing your religious/spiritual beliefs and devotion.
The hymn may be an affirmative message that you are deepening in your psyche. You are realizing that you pray twice when you sing. See Song.