the "amṛtasiddhi" places sun, moon, and fire inside the body. as in earlier texts, the moon is in the head, dripping "amṛta"; the text introduces the new idea that the sun/fire is in the belly, consuming the "amṛta", leading to death. the "bindu" is for the first time identified with the dripping "amṛta" and with semen. also for the first time, the text states that preserving this fluid is necessary for life: "the nectar of immortality in the moon goes downwards; as a result men die." (4.11) the "bindu" is of two kinds, the male being "bīja", semen, and the female being "rajas", the "female generative fluid". the text is the first, too, to link the "bindu" with the mind and breath, whose movements cause the "bindu" to move; and the first to state that the yogic practices of mahāmudra, mahābandha and mahāvedha can force the breath to enter and rise along the central channel.