Suppose I try saying something. What way do I have of knowing that if I say I know something I don't really not know it? Or what way do I have of knowing that if I say I don't know something I don't really in fact know it?

He who has mastered the true nature of life does not labor over what life cannot do. He who has mastered the true nature of fate does not labor over what knowledge cannot change.

Let your mind wander in simplicity, blend your spirit with the vastness, follow along with things the way they are, and make no room for personal views - then the world will be governed.