Son of God is pretty strong.

Jesus is literally God.

Jesus says that He is God. And he was murdered for saying it. As C. S. Lewis put the famous trilemma: Jesus is either a lair, a lunatic, or the Lord. There are no other options.

There's one other option... He could be God AND and lunatic and a liar. All at once. I'm not saying he is - only that its an option. Not directly related to that, but John 10:34 sure is interesting