I once heard a Ch'an teacher saying that it was the first few sentences in the Diamond sutra that was the most important. They are:
Thus have I heard. Once, the Buddha was staying in the Jetavana Grove in ?r?vast? with a community of 1250 monks. Then, at mealtime, the World Honored One put on his robe, took his bowl, and went into the great city of ?r?vast? to seek alms food, going from house to house within the city. Finishing, he returned home and took his meal. He then put away his robe and bowl, washed his feet, arranged his seat, and sat down.
The rest of the sutra is just intellectualization: the first verse is showing the practical, and no-nonsense workings of a Buddha. It was meal time, so he begged for alms. He was hungry, so he ate. And then he sat down. Not very mystical, not very interesting, not very important, and yet, his whole teaching presented right there.