Demon Candy

There is a natural tendency, when our practice starts to go well, to get excited at the prospect of attaining wonderful results very quickly. This excitement is believed to attract maras, malignant entities who create obstacles for us. It is like turning on a neon sign in our thoughts that says, "I am on the verge of a great breakthrough! Hey maras, come and get it!" Avoid this, because experience teaches us that this kind of excitement over hopes of great and swift results, rather than enhancing the practice, simply creates problems in our meditation.
~B. Alan Wallace