Jesus warns us that there will be massive religious deception in His Name. Many Churches are bringing the world into the Church. When King David had his men set the "Ark of God" upon a new cart, God was displeased. David used the same method the Philistines used of transporting the "Ark of God (David borrowed an idea from the Philistines)." The Philistines represent the world. God smote Uzzah. 2 Sam. 6
What is meant by the deeds of the flesh? It means everything that is wrong; the good and the bad, i.e., sin. Paul said, "Which was good deceived me."
No longer halt between two opinions. God demands that everything must be done by the Spirit and not of the flesh. Anything and everything that is borrowed from the world is a new cart.