Diamond sutra – chap 6
Subhuti said, “Sir, will there always be mature people who, when they hear these words, have a clear insight into the truth?”
The Buddha said, “Of course there will, Subhuti! Even thousands of years from now, there will many people who penetrate into the truth just by hearing these words and contemplating them. People like this, though they may not be aware of it, have not cultivated mental clarity as disciples of only one buddha; they have cultivated mental clarity as disciples of hundreds of thousands of buddhas. When they hear these words and contemplate them, they will see reality in a single moment, clearly, just as it is. Subhuti, the Buddha fully knows and appreciates these people as they wake up to their own true nature.
“How do they do this? Once they see reality clearly, these people never again attach to concepts of self or other. Nor do they attach to concepts of truth or non-truth. If these people’s minds attach to concepts of separate things, they will attach to concepts of self and other. If they deny the existence of things, they will still be attaching to concepts of self and other. So you should not attach to concepts of separate things, and you should not attach to the denial of separate things.
“That is why I tell people, ‘My teaching is like a raft.’ A raft is meant to get you across the sea; once you have crossed the sea, you leave the raft behind on the shore. If even correct teachings must be left behind, how much more so incorrect teachings!”