Second Advent
First Advent
The purpose of Christ's ministry is recorded in Luke chapter 4, where He Himself quotes from the later chapters of Isaiah:
Luke 4: “16 And he came to Nazareth, where he had been brought up: and, as his custom was, he went into the synagogue on the sabbath day, and stood up for to read. 17 And there was delivered unto him the book of the prophet Esaias. And when he had opened the book, he found the place where it was written, 18 The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives [the Israelites, who were described as prisoners and captives by Isaiah], and recovering of sight to the blind [we should know that we are Israel!], to set at liberty them that are bruised, 19 To preach the acceptable year of the Lord. 20 And he closed the book, and he gave it again to the minister, and sat down. And the eyes of all them that were in the synagogue were fastened on him. 21 And he began to say unto them, This day is this scripture fulfilled in your ears.”
Note that He stopped before proclaiming the Day of Vengeance, which has to do only with His second advent, and not His first.
Denial of Bastards
Matthew 7:21 Not all who say to Me ‘Prince, Prince!’ shall enter into the kingdom of the heavens, but he doing the will of My Father who is in the heavens. 22 Many shall say to Me in that day ‘Prince, Prince, have we not prophesied in Your name, and cast out demons in Your name, and have done many works of power in Your name?’ 23 And then shall I profess to them that ‘Never have I known you! Depart from Me, those who are working at lawlessness!’
No matter what men do or say, the covenants were made only with the children of Israel. Yahweh's words at Amos, where it was spoken to Israel that “you only have I known of all the families of the earth”, have never changed. Even if they seem to do well, the aliens cannot do well, since they can never honestly admit to Yahweh's exclusive relationship with Israel, and with His exclusive promises to preserve Israel. False teachers want to offer preservation to the aliens after the Second Advent, but the Bible makes it clear that only the children of Israel shall inherit the earth.
As we see in Luke, at 1:71, part of the purpose of Christ was to bring us “preservation from our enemies and from the hand of all those who hate us”, just as we see it professed in Psalm 107. I also quoted Psalm 112: “10 The wicked shall see it, and be grieved; he shall gnash with his teeth, and melt away: the desire of the wicked shall perish.” We need to be bought back from the enemy, because it is clearly evident that in our sin, they rule over us! It is they who shall be gnashing their teeth.