A question of ethics

First, thanks for both of your responses re: Eriugena. I think you both explained it about the best possible given our meat-brain capacities. Or incapacities. Whatever. I think, as Aaron said, the problem comes when we define God as "infinite" which would mean that all things are of Him. That is why Eriugena (and you) said "nothing" would be a better term.

Moving on, I was preparing my lesson on WWII and came across this bit of info about Bonhoeffer. He said that ethics is determined by two things:

1. The need of one's neighbor
2. The model of Jesus of Nazareth.

There are no other guides, since Bonhoeffer denies that we can have knowledge of good and evil. Your thoughts?