[GarySpFc]

We know that the speaker in Revelation 1:18 is not God Himself because he says: "I am He who lives, and was dead, and behold, I am alive forevermore."
God cannot die, so that is Jesus talking.

AS God Jesus Christ could not die, and that is the reason for the Incarnation. Spend time in prayer for the answer.

[BroJoeK]

GarySpFc: "AS God Jesus Christ could not die, and that is the reason for the Incarnation."

The oldest creed, the Apostles' Creed (circa 180 AD), says that Jesus:

"suffered under Pontius Pilate,
was crucified, died and was buried;
he descended into hell;
on the third day he rose again from the dead..."

Yes, I agree that much later creeds -- i.e., Nicaene, Athanasian -- blur or fuzzy-up the question.
But there can be no doubt whatever that the earliest Christians believed Jesus died on the cross.

Therefore, Jesus was not God Himself.