Hi Drett, Thanks for the reply.
Can you please refer me to cases where it is explicitly stated that polygamy is not only acceptible, but also is part of God's created design. I think you will appreciate the difference between the two when we consider the relevance that distcintion has to the related question of divorce. Jesus explicitly states that he and Moses teach two different things on the issue of divorce, so it is also important we clarify that question in this matter as well.
Answering that question will also help us answer how this question relates to your quote from Matthew 5:17, which critically turns on what is meant by the world 'fulfill'.
As for Augustine, again, you assert that he 'invented' the banning of polygamy in Christianity, and the only proof you offer is that he wrote against the practice. You ignore my previous post where I specifically name other pre-Augustinian writers who also write against the practice. I could also reference the pre-Christian Hillelites, or the Qumran community, as examples of people who thought polygamy was an objectionable practice for contemporary communities.
I did not say Augustine referred specifically to the the teaching of Jesus, I simply said he was reasoning from the Scriptures, which he does. He also reasons against it in that it is not acceptable under civil law. He makes the point that the church fathers did not have multiple wives out of lust, but for the purposes of filling the earth, which I think is questionable (I disagree with Augustine?! What?). But really, it matters little to me what you think of what Augustine wrote. I'm happy to cede the point - I have no particular desire to defend the specifics of Augustine's argument on the matter, as I merely referred to it as a secondary matter.
If you wish to deal with the specifics of Jesus teaching (which you did not address in your last post, only to say he did not make an explicit stateent. However, as I have already written, I do believe he makes at the very least a relevant remark)
Really? That's an argument from silence if ever I've seen one.
For reference, here is a short list of other things Jesus did not come straight out and explicitly ban:
1. Being drunk
2. Rape
3. homosexual sex
4. abortion
5. cannibalism
6. Drug taking
7. Speeding
8. belief and practice of witchcraft
Jesus can reject things by the principle of what he teaches, not just by explicitly saying "do this, do that". In fact, to often be deliberately general and image-based in his teaching is quite a Jesus kind of thing to do. You will have to show me Jesus not banning polygamy outright is sufficient to accept polygamy, particularly given the teaching of the rest of the Bible.