"In consequence of sin Moses had come under the power of Satan. In his own merits he was death's lawful captive; but he was raised to immortal life, holding his title in the name of the Redeemer. Moses came forth from the tomb glorified, and ascended with his Deliverer to the City of God. PP 479.1"
"For as in Adam all die, even so in Christ shall all be made alive."
The EGW passage describes Moses' resurrection and ascension due to Christ's redemption, echoing the general principle of resurrection through Christ as stated in 1 Corinthians 15:22.
"Upon the mount of transfiguration Moses was present with Elijah, who had been translated. They were sent as bearers of light and glory from the Father to His Son. And thus the prayer of Moses, uttered so many centuries before, was at last fulfilled. He stood upon the “goodly mountain,” within the heritage of his people, bearing witness to Him in whom all the promises to Israel centered. Such is the last scene revealed to mortal vision in the history of that man so highly honored of Heaven. PP 479.3"
"And, behold, there appeared unto them Moses and Elias talking with him."
The EGW passage directly references the transfiguration and Moses' presence there, mirroring the event described in Matthew 17:3.