When Jesus speaks, in John's Gospel, about being the bread of life, he is explicitly identifying himself as the Messiah to his listeners. He is telling them that he is going to bring the return of the miraculous manna to the children of Israel. It was the sign that the people of the time expected of the Messiah.
I'm taken with how Jesus reshapes the passover ritual given my Moses into the passover of the Messiah. He takes the story that Moses commands the chosen people to remember and adds to it.
We need to pay particular attention to what Jesus does here, because we are commanded to remember his words not once a year, but now once a week.