The bodhisattva cannot pass over into Nirvana. He cannot because, were he to do so, he would exhibit a selfishness that a bodhisattva cannot have. If he has the selfishness, he is not a bodhisattva, and so cannot enter Nirvana. If he lacks the selfishness, again, he cannot enter Nirvana, for that would be a selfish act. So either way, the bodhisattva is impotent to enter Nirvana. … So no one can reach Nirvana; we cannot because we are not bodhisattvas and the bodhisattva cannot because he is a bodhisattva.
– Arthur Danto, Mysticism and Morality, 1972