The benefits of teaching the Diamond Cutter sutra

Suppose on the other hand that some son or daughter of noble family were to take up even so little as a single verse of four lines from this perfection of wisdom, or hold it, or read it, or comprehend it, or teach it to others in detail, and accurately. They would from this act create infinitely more great mountains of merit, beyond all count, and beyond all calculation.

And what would it be, to teach this perfection accurately to others? It would be just the same as not teaching it to others. And that is precisely why we can call it "teaching it to others, accurately."