Mystery Causes Veneration

Keep matters in suspense ... Being too obvious is neither useful nor tasteful. By not declaring yourself immediately you will keep people guessing, especially if your position is important enough to awaken expectations. Mystery by its very arcaneness causes veneration. Even when revealing yourself, avoid total frankness, and don't let everyone look inside you. Cautious silence is where prudence takes refuge. 

- The Art of Worldly Wisdom, Baltasar Gracián