It is not so much the case that God has a mission for his church in the world, as that God has a church for his mission in the world. Mission was not made for the church; the church was made for mission - God’s mission.

The issue in the Bible is not just "Do you believe in God or not?" Everybody believed in gods of some sort. The question was, "Who is truly the only living God?" And if that God is indeed Yahweh the God of Israel, then there are consequences in real life - as shown in the Torah.

As Paul says, even though we as human beings know God, we refuse to acknowledge him. That's what Peter did. He refused even to "know" Jesus! Peter's failure reflects all our failure. It forces us to face the reality about ourselves. But the point of the story is that Jesus foretold this - he knew it was coming. And Jesus forgave Peter, when Peter confessed his love for Jesus. So the story illustrates both the horrible nature of sin, and the amazing reality of grace. That's essential to the whole meaning of the gospel.

God cannot suffer - at least not as we do. It has some roots in Greek philosophy: if God is a perfect being, suffering would reduce that perfection, so God cannot suffer. More thoughtful theologians take the phrase in the sense of one of the confessions of faith that talks of God as being "without parts or passions" - he is not physical as we are, and not subject to "passions" in the sense of uncontrollable emotions that can take charge of us at times. God is not "emotional," if that word is used as some kind of weakness.

The Bible itself does not seem too bothered by the idea that talking of God suffering might in any way diminish God, or detract from his perfection. On the contrary, the Bible seems to revel in the richness of describing God in ways that reflect our own human realities.

Old Testament Israel had some foundational pillars of faith. They were true and robust and God given. The trouble was that people had come to trust in them merely by repeating them, without paying any attention to the ethical implications of what their faith should mean in how they lived. They believed God had given them their land. He had. But they had not lived in it in either gratitude or obedience. They had not fulfilled any of the conditions that Deuteronomy had made so clear.

Only the gospel exposes the cancer of idolatry.