# "I am the Alpha and the Omega," says the Lord God, "the one who is ... the Almighty."
"The Lord God says, 'I am the Alpha and the Omega, the one who is ... the Almighty.'" or "'I am the Alpha and the Omega, the one who is ... the Almighty,' says the Lord God."
# the Alpha and the Omega
"the A and the Z" or "the first and the last"
# who is to come
Existing in the future is spoken of as coming.