Related Verses: John 16:7-11; Rom. 8:22-27; 2 Cor. 5:1-5
Leading Question: What is the most important work of the Spirit?
In John 14-17, the promise that God would send the paraclete (Comforter, Advocate) looms large on the horizon. The fact that Jesus describes the Advocate as his personal representative could qualify that role as being the most important work of the Spirit. And that Advocate is said to accomplish three things:
John 16:7 (NIV): 7 But very truly I tell you, it is for your good that I am going away. Unless I go away, the Advocate will not come to you; ...