Plaster covers rough walls with a smooth face, read as the finish you put on things for others to see. Crumbling plaster stands for a surface no longer hiding what lies beneath.
Where in your waking life have you met something like this lately?
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.