Then many of his disciples who were listening said, "This saying is hard; who can accept it?" Since Jesus knew that his disciples were murmuring about this, he said to them, "Does this shock you? …
And he said, "For this reason I have told you that no one can come to me unless it is granted him by my Father." As a result of this, many (of) his disciples returned to their former way of life and no longer accompanied him. Jesus then said to the Twelve, "Do you also want to leave?" Simon Peter answered him, "Master, to whom shall we go? You have the words of eternal life. We have come to believe and are convinced that you are the Holy One of God." (Jn 6:60-69)
Murmuring and shock are part of Exodus experience. Israelites grumbled and were shocked at the teaching of Moses in the original exodus event. Now Jesus is taking the new Israelites into a new exodus and they are murmuring and are shocked at his teachings. Some of them even leave him and go back to their previous way of life. Murmurings and shocks seem to be the regular reactions of the disciples.
There was a division among his followers. Jesus was left with twelve. This is over simplifications. Crowds followed him even after this. There was a crowd leading him to Jerusalem. But Jesus attitude is that all these happen according to the will of the Father. Because he says that no one can come to me unless the Father grants it. So disciples coming and leaving are also done by the Father.
The twelve remain. They are ready to say that he is the holy one of God. He not only speaks about God’s new age, but also makes the new age present among them through his words and deeds (You have the words of eternal life). Jesus knows well that one of them will betray him. However, for the moment these twelve are the representatives of the faith. That is God was working his great movement (new exodus free from sin and death) through the words and deeds of Jesus.
