Adam was a deceiver. He didn’t trust God’s word. He exalted his standard above’s God’s in the worship of himself. Humans, created to image the majesty of God, rebelled and imaged the character of the serpent. This was the fall. And it’s not just Adam’s story, it’s our story, too.
Sin is not a thing we can just sweep under the rug. It’s not a little this or that. Oh no. Sin is most fundamentally our acting like Satan instead of reflecting the glory of God.