By alien, I don't mean Jesus came from another planet. It's more like, He came from another dimension, which could be called Heaven. Jesus said He wasn't from Earth:
John 8:23 NIV
But he continued,
"You are from below; I am from above. You are of this world; I am not of this world."
Later, Jesus told His followers that those who are born again, are no longer of the Earth, but of Heaven.
John 15:19
"If you belonged to the world, it would love you as its own. As it is, you do not belong to the world, but I have chosen you out of the world. That is why the world hates you."
This is why Paul later wrote that Christians are "aliens and strangers upon the Earth.
Jesus mentioned this concept a few more times:
John 17:14
"I have given them your word and the world has hated them, for they are not of the world any more than I am of the world."
John 17:16
"They are not of the world, even as I am not of it."
John 18:36
Jesus said,
"My kingdom is not of this world. If it were, my servants would fight to prevent my arrest by the Jews. But now my kingdom is from another place."
Paul sums it up, by telling us where our true allegiance lies:
Philippians 3:20
But our citizenship is in heaven. And we eagerly await a Savior from there, the Lord Jesus Christ...
I can't wait to get my passport stamped!