[danielam]

While I agree that it is impossible to take Jesus seriously without also taking seriously his claim to divinity, I do not understand the example you've given concerning adultery. Not everything that Jesus taught was a matter of revelation. Much of it can be arrived at with the use of unaided reason. In this case, adultery and lust are moral concerns that do not require an appeal to Jesus' authority. It is entirely possible for a non-Christian to come to the same conclusion just as it is possible to consider many moral questions without appealing to God. Whether something is good for human beings depends on human nature. God comes in when we wish to account for the existence of human nature (or anything at all) in the first place. Typically, those who base morality on arbitrary divine command hold to a mechanistic metaphysics that permits no other basis for morality.