Sunday school brings back the first lessons about right and wrong. It is traditionally read as a return to the values you were taught as a child, and to how they sit with you now.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.