Tao-sheng Commentary on the Lotus Sutra, p295The duration of my life, which I obtained by the practice of the way of Bodhisattvas, has not yet expired.
When he was treading the bodhisattva path in the past, his lifespan “was twice the preceding [number].” It should be known, therefore, that though [his life-span] was compared to the number of grains of sand, the tiniest part of it has not yet been exhausted. Now the Buddha is described by way of a bodhisattva; the Buddha’s life-span is long [in comparison with the bodhisattva’s].