It is true that the people of modern times have the benefit of the attainments of their predecessors. The men of masterly minds, who planned and studied and wrote, have left their work for those who follow. But even in this respect, and so far as merely human knowledge is concerned, how much greater the advantages of the men of that olden time! They had among them for hundreds of years him who was formed in God's image, whom the Creator Himself pronounced “good”—the man whom God had instructed in all the wisdom pertaining to the material world. Adam had learned from the Creator the history of creation; he himself witnessed the events of nine centuries; and he imparted his knowledge to his descendants. The antediluvians were without books, they had no written records; but with their great physical and mental vigor, they had strong memories, able to grasp and to retain that which was communicated to them, and in turn to transmit it unimpaired to their posterity. And for hundreds of years…
"So God created man in his own image, in the image of God created he him; male and female created he them."
The EGW passage explicitly mentions that Adam was formed in God's image and quotes the phrase "good," directly referencing Genesis 1:27 and the creation account.
"had opportunity to receive instruction from Adam, and those who feared the Lord had also Christ and angels for their teachers. And they had a silent witness to the truth, in the garden of God, which for so many centuries remained among men. At the cherubim-guarded gate of Paradise the glory of God was revealed, and hither came the first worshipers. Here their altars were reared, and their offerings presented. It was here that Cain and Abel had brought their sacrifices, and God had condescended to communicate with them. PP 83.2"
"So he drove out the man; and he placed at the east of the garden of Eden Cherubims, and a flaming sword which turned every way, to keep the way of the tree of life."
The EGW passage directly references the cherubim guarding the gate of Paradise, which is explicitly mentioned in Genesis 3:24. It expands on the scene, adding details about worship and sacrifices, but the core image is clearly derived from the biblical text.