Jesus was a man who was born, lived and died to fulfill a few purposes. He came to experience life so that, like all of us, he could gain the experiences only possible with a physical body of flesh and bones. Like the all of us, He was here to feel pain, suffering, loss, hardship; love, friendship, and beauty... and betrayal (among all the other things that come with flesh and bone). Like the rest of us, He was here to overcome the weaknesses of the flesh. Unlike the rest of us... He succeeded.
He was also here to fulfill the law of Moses, ushering in a higher law and teach us what we need to know to be more like Him.
He was here to take the sins of the world upon himself, so that all who accept his atonement can be made clean of the sins we commit.
Having lived a life on this earth, and suffering more than anyone else ever had, or will, He became uniquely qualified to judge us. Because of this, there is no one left with any excuses. No one can look upon Him at the judgement day and say anything like, "You just don't understand what life was like!"
To me, the most amazing part of what He did was, on the cross, when he was dying, He said, "My God, My God, Why hast thou forsaken me". In the end, he had to do it as just a man. While He was born and lived part man and part God... He had to die, just a man, alone.