The Law of Moses can be understood as forming the Moral Law and the Ceremonial Law. Both aspects of the Law died when we came to faith in Christ.
The Moral Law died in its condemning power, because those who are in union with Christ by faith died with him, and the law no longer has any power over a person who is already dead. So, though the Moral Law ...
The vision was understood by Peter in a specified way as listed in Acts 10:27-29
As Peter talked with him, he went inside and found many people
gathered together. He said to them, “You know how unlawful it is for
a Jew to associate with a foreigner or visit him. But God has shown me
that I should not call any man impure or unclean. So when I was
Although you specifically ask about the designation ‘First and Last’, there is a clear biblical link to that and the oft-concurrent designation ‘Alpha and Omega’, which is abundantly clear in the book of Revelation, and in JW literature. See https://www.jw.org/en/bible-teachings/questions/alpha-omega/ Who or What Is “the Alpha and the Omega”?
“The Alpha ...
I'm not certain this speaks for Jehovah's Witnesses as a whole, but the method of interpreting these references to being "first and last" by some adherents seems to involve considering the phrase to have different meanings based on the context.
A summary of this hermeneutical method is given by this blog:
The answer is, of ...