Q&A on Contemplative Practice of the Four Establishments of Mindfulness 3

Question: How should one handle the mental experiences of the mind consciousness during contemplative practice (vipaśyanā-caryā)?
Answer: In the contemplative practice of the four foundations of mindfulness, one should initially focus primarily on observing the breath; set aside everything else for the time being, do not let your attention scatter, and concentrate your energy solely on the breath. If the body produces sensations such as pain, numbness, or itching, pay no attention to them; always keep the mind anchored on the breath and do not stray from the theme. If the sensations of pain and the like truly become unbearable and interfere with the contemplative practice, then adjust the body a little to make it more comfortable, and then continue to concentrate your energy on contemplating the four foundations of mindfulness. If the body experiences sensations such as tranquility and comfort, pleasure, the body feeling tall and large, or emptiness, do not pay attention to them or become attached to them; continue to keep the mind anchored on the breath and contemplate the breath, ignoring everything else.
Only by contemplating single-mindedly in this way, becoming ever more focused, ever more clear and lucid, and knowing ever more deeply and thoroughly, will the manas become ever more clear and understanding. Only then can one genuinely perceive the arising, abiding, changing, and ceasing of the breath and the material body, and perceive that the body is empty and the self is empty. This is knowing with wisdom. After knowing in this way, both body and mind are transformed, and one is no longer the ignorant and deluded person of the past.