"Just as, bhikkhus, if a stick is thrown into the air, sometimes it lands on its base, and sometimes it lands on its tip; in the same way, bhikkhus, beings obstructed by ignorance, and fettered by craving, continue to run and wander in this cycle of existence. Sometimes they go from this world to the other world, and sometimes they come from the other world to this world. And what is the reason for this? It is because, bhikkhus, they have not seen the Four Noble Truths.

And what are these four? The Noble Truth of suffering, the Noble Truth of the arising of suffering, the Noble Truth of the ending of suffering, the Noble Truth of the way of practice leading to the ending of suffering.

Therefore, bhikkhus, effort should be made to fully understand: 'This is suffering'; effort should be made to fully understand: 'This is the arising of suffering'; effort should be made to fully understand: 'This is the ending of suffering'; effort should be made to fully understand: 'This is the way of practice leading to the ending of suffering.'"