Tilopa's verses of the six dharmas briefly outlines the practice as follows:The yogic body, a collection of energy channels, coarse and subtle, possessing the energy fields, is to be brought under control. The method begins with the physical exercises. The vital airs energies are drawn in, filled, retained and dissolved. There are the two side channels, the central channel "avadhuti," and the four chakras. Flames rise from the "chandali" fire at the navel. A stream of nectar drips down from the syllable "HAM" at the crown, invoking the four joys. There are four results, like that similar to the cause, and six exercises that expand them.