John 6:61

Verse 61. If Christ had wished to say nothing else than that his disciples should be filled with his doctrine, that being his flesh and blood, it would not have been a hard saying; neither would it have shocked the Jews. He had already said as much in the former part of his discourse: but he goes on in still stronger terms, notwithstanding their complaints; and, as they were ignorant how he would fulfil his promise, they left him, (Calmet) and followed the example of the other unbelieving Jews, as all future sectarists have, saying: how can this be done?