For sermon-prep help, I frequently look at hymns, paintings, novels, poems, etc. Also Bach cantatas. Meinen Jesus laß ich nicht, written for the first Sunday after Epiphany, has intrigued me with its interpretation of Luke 2:41-52.
I love this story about Jesus and his parents and am astonished by the author’s deep understanding of the human condition. Mary and Joseph were facing the adolescent years with a most unusual child, and yet we have only this one glimpse in scripture of that time in their lives.