[jonesboy]

This is a good one and very important.

The fourth simile stresses the importance of not settling for anything less than the genuine thing:

A man searching for heartwood goes into a forest and comes to a tree containing heartwood, but instead of taking the heartwood, he takes home some sapwood, branches, or bark.

Faith in the possibility of nirvana — the heartwood of the path — is what keeps you from getting waylaid by the pleasures of the sapwood and bark: the gratification that comes from being generous and virtuous, the sense of peace, interconnectedness, and oneness that comes with strong concentration. Yet, surprisingly, modern discussions of the role of faith in the Buddha's teachings rarely mention this point, and focus on faith in karma and rebirth instead. This is surprising because nirvana is much less related to our everyday experience than either karma or rebirth. We see the fruits of our actions all around us; we see people being born with distinct personalities and differing strengths, and it's only a short leap to the idea that there's some connection between these things. Nirvana, however, isn't connected to anything we've experienced at all. It's already there, but hidden by all our desires for physical and mental activity. To touch it, we have to abandon our habitual attachment to activity. To believe that such a thing is possible, and that it's the ultimate happiness, is to take a major leap.

Many in the Buddha's time were willing to take the leap, while many others were not, preferring to content themselves with the branches and sapwood, wanting simply to learn how to live happily with their families in this life and go to heaven in the next. Nirvana, they said, could wait. Faced with this honest and gentle resistance to his teaching on nirvana, the Buddha was happy to comply.

But he was less tolerant of the stronger resistance he received from brahmas, heavenly deities who complacently felt that their experience of limitless oneness and compassion in the midst of samsara — their sapwood — was superior to the heartwood of nirvana. In cases like this he used all the psychic and intellectual powers at his disposal to humble their pride, because he realized that their views totally closed the door to Awakening. If you think that your sapwood is actually heartwood, you won't look for anything better. When your sapwood breaks, you'll decide that heartwood is a lie. But if you realize that you're using bark and sapwood, you leave open the possibility that someday you'll go back and give the heartwood a try.

Of course, it's even better if you can take the Buddha's teachings on nirvana as a direct challenge in this lifetime — as if he were saying, "Here's your chance. Can you prove me wrong?"