In Rev 22:12-13, Jesus Christ, the one who is "coming quickly", says of himself," I am the Alpha and the Omega, the first and the last, the beginning and the end". In Rev 1:17-18, Jesus, the one who "became dead, but, look! I am living forever and ever", refers to himself as the first and the last. Rev 21:6, in speaking of God, says, "...I am the Alpha and the Omega, the beginning and the end .,.". God is also referred to as the "first" and the "last" in Isa 44:6 and Isa 48:12. How can this be since by definition of these words there can only be one first and one last?_____________________________________
The questioners' definition of first and last does not take into consideration the unique unique relationship that exists between God and Jesus. God, of course, has always existed and will always exist. In that respect he is the First and Last. But, Jesus has the distinction of being the firstborn of all creation, the first born again son of God, hence Paul described him as the firstborn of many brothers (God does not have any brothers - only sons) Jesus is also firstborn from the dead, that he may be first in all things among God’s creation. Jesus is also the last Adam and the last in the sense that no other creation will ever usurp his greatness or replace him as the preeminent son of Jehovah.