All four traditions of Tibetan Buddhism accept as a meaning of tantra the everlasting successions of moments of interwoven Buddha-nature factors. Through an everlasting continuum of meditation practice of bonding with Buddha-figures, tantra practitioners attain the everlasting continuum of Buddhahood, based on the everlasting fact of the voidness of their mental continuums. Because tantra practice entails producing appearances of oneself as Buddha-figures that resemble the resultant state of enlightenment, tantra is called the “resultant vehicle.”