Positively, he learned that it is through kindness, compassion and forgiveness that we prove ourselves to be children of God. The bread that Jesus brought down from heaven was the bread of life, the bread of himself, the bread of love. We find an experience of eternity and the demise of death. The lesson God teaches us is that through death we gain life, through dying to self we come to experience the joys of heaven. Ignorance of this fact is to be really dumb.
Sin impairs our seeing and hearing.
We distance ourselves from God by failing to be bread for one another. Not surprising we too, like the Jews of Jesus' day, murmur about this son of Joseph who claims to be divine. God's primary classroom is the Eucharist. It is here that we hear God's word and receive the very person of Jesus. It is in this meal and sacrifice that we come to understand both our identity as beloved children of God and our destiny that transcends this earth.