The practice of radiance in the waking state involves visualizing oneself as the deity in sexual union and meditating on a blue HUM at the heart chakra which emanates light in all directions that purifies the universe. One dissolves the world into light and into oneself as the deity, then one dissolves into the mantric syllable HUM in one's heart chakra. The HUM then melts into light from the bottom up and one focuses the mind on the heart chakra. Then one practices collecting the vital winds into the central channel with the tummo method explained previously, which melts the drops, leading to the four blisses and the four emptinesses. One then experiences the dissolution of the elements and corresponding visions (see below), and then the radiance arises. One then joins the mind of radiance with meditation on emptiness.