Haha, I will amend my statement yet again. This is what I really meant, for real this time, seriously guys.
Nibbana is the heart
wood of the path.
"In the same way, monks, there is the case where a certain son of good family, out of conviction, goes forth from the home life into homelessness, [thinking,] 'I am beset by birth, by aging-&-death, by sorrows, lamentations, pains, distresses, & despairs, beset by stress, overcome with stress. Perhaps the end of this entire mass of stress might be discerned!' Having thus gone forth, he encounters gain, offerings, & fame. He is not gratified with that gain, offerings, & fame, his resolve not fulfilled. He is not intoxicated with that gain, offerings, & fame, not heedless about it, and does not fall into heedlessness. Being heedful, he achieves consummation in virtue. He is gratified with that consummation in virtue, but his resolve is not fulfilled. Because of that consummation in virtue he does not exalt himself or disparage others. He is not intoxicated with that consummation in virtue, not heedless about it, and does not fall into heedlessness. Being heedful, he achieves consummation in concentration. He is gratified with that consummation in concentration, but his resolve is not fulfilled. Because of that consummation in concentration he does not exalt himself or disparage others. He is not intoxicated with that consummation in concentration, not heedless about it, and does not fall into heedlessness. Being heedful, he achieves knowledge & vision. He is gratified with that knowledge & vision, but his resolve is not fulfilled. Because of that knowledge & vision he does not exalt himself or disparage others. He is not intoxicated with that knowledge & vision, not heedless about it, and does not fall into heedlessness. Being heedful, he achieves a non-occasional liberation. And it is impossible, monks, there is no opportunity, for that monk to fall from that non-occasional release.
"Monks, this holy life doesn't have as its reward gain, offerings, & fame, doesn't have as its reward consummation of virtue, doesn't have as its reward consummation of concentration, doesn't have as its reward knowledge & vision, but the unprovoked [2]awareness-release: That is the purpose of this holy life, that is its heartwood, that its final end."
-MN 29
Also see MN 30.