"the merits of His blood, find pardon for past transgressions, and by obedience be brought back to the garden from which they were driven. Then they could again have access to the glorious, immortal fruit of the tree of life to which they had now forfeited all right. EW 126.1"
"Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city."
Both passages connect obedience/doing commandments with access to the tree of life. While not a direct quote, the theme of regaining access to the tree of life through obedience is present in both.
"Then joy, inexpressible joy, filled heaven, and the heavenly choir sang a song of praise and adoration. They touched their harps and sang a note higher than they had done before, because of the great mercy and condescension of God in yielding up His dearly Beloved to die for a race of rebels. Then praise and adoration was poured forth for the self-denial and sacrifice of Jesus, in consenting to leave the bosom of His Father, and choosing a life of suffering and anguish, and an ignominious death, that He might give life to others. EW 126.2"
"And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross."
The EGW passage describes the joy and adoration in heaven due to Jesus' sacrifice, which is directly related to the humility and obedience of Christ described in Philippians 2:8. The passage amplifies the emotional and cosmic significance of the event.
"And suddenly there was with the angel a multitude of the heavenly host praising God, and saying, Glory to God in the highest, and on earth peace, good will toward men."
Both passages describe a scene of heavenly hosts praising God. While the specific reasons for praise differ (Jesus' birth vs. Jesus' sacrifice), the general theme of heavenly praise is present in both.