Chogyam Trungpa

"You are absolutely comfortable and happy the way you are, yet at the same time you find it excruciatingly painful.  You are not certain whether you want to stay the way you are, which is very pleasurable, or not stay the way you are, because it is very painful at the same time.  That kind of pushing and pulling happens all the time.  That seems to be the motivation and the contagious quality of Buddha nature, which is trying to shine through all the time."