Last Sunday, the Israelites were grumbling about food; this Sunday the crowd is grumbling about who Jesus says he is. At least today, the grumbling is about what is really important – the identity of Jesus and how we gain eternal life! The surprise this Sunday is how persistent God is in bringing us to new and eternal life. Jesus persists in revealing himself as the bread sent by God to nourish us for our journey to eternal life. And it is not without cost. For Jesus it is the cross. For us it is the bread of suffering. To eat of this bread is to take upon ourselves a life of self-giving. That is why the Gospel is so difficult. We are planted firmly on this good earth – we are to give our very self for the life of the world through the good we do every day for others. No wonder the murmuring.