"Tissa, it's as if there were two men, one not skilled in the path, the other. In that case the man not skilled in the path would ask the man skilled in the path about the path. The second man would say, 'Come, my good man, this is the path. Go along it a little further and you will see a fork in the road. Avoiding the left fork, take the right. Go along a little further and you will see an intense forest grove. Go along a little further and you will see a large marshy swamp. Go along a little further and you will see a deep drop-off. Go along a little further and you will see a delightful stretch of level ground.
"I have made this comparison, Tissa, to convey a meaning. The meaning is this: The man unskilled in the path stands for a run-of-the-mill person. The man skilled in the path stands for the Tathagata, worthy & rightly self-awakened. The fork in the road stands for uncertainty. The left fork stands for the eightfold wrong path — i.e., wrong view, wrong resolve, wrong speech, wrong action, wrong livelihood, wrong effort, wrong mindfulness, wrong concentration. The right fork stands for the noble eightfold path — i.e., right view, right resolve, right speech, right action, right livelihood, right effort, right mindfulness, right concentration. The intense forest grove stands for ignorance. The large marshy swamp stands for sensual desires. The deep drop-off stands for anger & despair. The delightful stretch of level ground stands for Unbinding.