When the vital-energy rises (to the head and produces tension) you should establish your will like a mountain, and calm your mind like the sea. Sit erect on your cushion and contemplate the tan-t’ien (Jap. Hara) with the mind’s eye. (When you are troubled by headaches) gently put the feeling of doubt into the tan-t’ien. Through this unawareness and non-attention the hua-t’ou will quickly ripen. Eventually the body will seem to be like empty space; it will seem both to exist, and not to exist. When the mind and body are very light and comfortable, you will gradually enter into auspicious states. As you are now transmuting iron into gold, you ought to be very careful. Be diligent!