For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
Let's be clear about this 'Fully Man' thing.Every man conceived by man has a sin nature. He is fully man.
Jesus is said to be fully man and he didn't have a sin nature, because he wasn't conceived by a man.
So he is different from every other man.
Is he "fully man" in the sense that he's just like any other man? Of course not! So 'fully man' is a little bit of a misnomer. It is to be understood within reason.
It's similar to what was said about Adam and Eve, said to be "created in the image of God." That's to be understood within reason. They had a capacity to obey or disobey God. God doesn't have that capacity. The word says, "He remains faithful, for he cannot deny himself" (2 Tim 2:13). Listen to that! This is being said about Jesus. If Jesus is unfaithful to God he's unfaithful to himself. (the teachers here who say Jesus was capable of sin need to study that scripture until the light shines from it into your heart and mind).
It doesn't say that he won't, it says he can't! It says he remains faithful to himself.
You have to dismiss a truckload of scripture to teach that God can sin. You also have to dismiss a truckload of scripture to teach that Jesus isn't God!