Answer: In music we have many notes, but we call one note the key-note. Really speaking, every note can be a key-note, and there must be a central point for everything. For a plant it is the root which is the center, and for the breath there is a seat in the body. If the breath is properly seated there, it is just like a plant which is well-rooted into the ground and will grow nicely and bear fruit. If the plant is not rooted well there is always a chance of its being destroyed. So in the life of man, if the breath is not centralized in its center, in the seat where it ought to be, then it is doubtful whether the person will live long and be happy.