Thoughts on 1 Corinthians 15:45

"So also it is written, "the first man, Adam, became a living soul." The last Adam became a life-giving spirit."

Adam: 

The body was created first, and God "breathed" life into him (Gen 2:7). Adam's body was first, then the spirit second. Yet Adam used that life to rebel against God. This is NOT significant because "a man in the position of representation for all creation rebelled," but instead it is significant because the first man rebelled—not just a man. The narrative in Eden was not that, oh, well, eventually some person will eat of the forbidden tree, but the story emphasizes how quickly the rebellion took place, and again, how it was the first person created. There was no "digression" in human goodness. God created. Man walked. Man walked right to the Tree. We are sinful. 

Christ:

God the Son exists eternally as Spirit. This Spirit chose to be incarnate as the man Jesus (the act of kenosis). Thus God the Son was Spirit first, then body. Yet He is a not a body that received life, but gives life.