In anuttarayoga tantra practice, through working with visualizations in our imagination on the generation stage, we train our energy-winds to configure in the form of a Buddha-figure. Based on our minds and energy-winds having become habituated to such practice and having attained perfect concentration, we then, with complete stage practices, bring the gross and subtle energy-winds into the central channel so as to activate the subtlest level of our minds and energy-winds to give rise to the Enlightening Bodies of a Buddha.