Did God will for the Spirit and the flesh to be in opposition from the beginning?

Galatians 5:17 says, *"For the flesh desires what is contrary to the Spirit, and the Spirit what is contrary to the flesh."* This seems to suggest a deliberate opposition between the two. My question is: Was this opposition between the Spirit and the flesh part of God's original design from the beginning (before the Fall), or did it come about as a result of sin? In other words, did God will for this tension to exist under His authority, or is it a result of rebellion against that authority? I’m looking for answers from perspectives that explain how this dynamic fits into Christian theology — particularly with reference to Scripture and doctrinal traditions.