The Buddha said: "A man beginning a long journey sees ahead a vast body of water. There is neither boat nor bridge. To escape the dangers of his present location,
he constructs a raft of grass and branches. When he reaches the other side he realizes how useful the raft was and wonders if he should hoist it on his back and carry
it with him forever. Now if he did this, would he be wise? Or, having crossed to safety, should he place the raft in a high dry location for someone else to use? This is
the way I have taught the dharma, the doctrine - for crossing, not for keeping. Cast aside every proper state of mind, oh monks - much less wrong ones - and remember well to leave the raft behind!"