This is indeed the highest penance, if a man, laid up with sickness, suffers pain. He who knows this, conquers the highest world. This is indeed the highest penance, if they carry a dead person into the forest. He who knows this, conquers the highest world. This is indeed the highest penance, if they place a dead person on the fire. He who knows this, conquers the highest world.

In plain words: When a sick person suffers pain, that suffering counts as the highest spiritual discipline. Being carried to the forest after death, and being placed on the funeral fire, also count as the highest discipline. Whoever understands this wins the highest world.