Those who work at a thing heart and soul not only achieve success in it but through their absorption in that they also realize the supreme truth-Brahman. Those who work at a thing with their whole heart receive help from God.
This one question-'What do I know for certain?'-is tremendously powerful. When you look deeply into this question, it actually destroys your world. It destroys your whole sense of self, and it's meant to. You come to see that everything you think you know about yourself, everything you think you know about the world, is based on assumptions, beliefs, and opinions-things that you believe because you were taught or told they were true. Until we start to see these false perceptions for what they really are, consciousness will be imprisoned within the dream state.
This is the real secret of life -- to be completely engaged with what you are doing in the here and now. And instead of calling it work, realize it is play.