The arhatas are those sannyasins who have arrived but are not interested in helping others to arrive. Buddhism has a special name for them: arhata — the lonely traveler who arrives and then disappears into the ultimate. And the bodhisattvas are those who have arrived but they feel a great compassion for those who have not yet arrived. The bodhisattva is an arhata with compassion. He holds on, goes on looking back and goes on calling forth those who are still stumbling in darkness. He is a helper, a servant of humanity.