Writing an essay stands for organising thoughts and making a case. Tradition reads it as a need to explain yourself clearly, or a worry about being evaluated.
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.