In order to be principled and methodical in your training, keep your awareness constantly with the body. Keep mindfulness focused there and use wisdom to investigate within the sphere of the body. The more you investigate the body until you understand it clearly, the more sharply you will understand the affairs of feelings, memory, thought-formations, and consciousness, because all these things are whetstones for sharpening wisdom step by step. It's the same as when we bail water out of a fish pond: the more water we bail out, the more clearly we'll see the fish. Or as when clearing a forest: the more vegetation we cut away, the more space we'll see. When you use wisdom to contemplate in this way, the currents of the heart will become plain...