First is the initial requirement to follow Christ. In John 16:8 – 10, Christ tells us that the Spirit is the one who convicts men of their need for Christ. He is the one that draws men to Christ. Without the Spirit’s intervention the eyes of those in bondage are blind to their need for Christ, 2 Corinthians 4:3. The Spirit pierces that darkness.
Secondly, the Spirit enables us to know Christ thru the truth of His Word. In the same chapter of John, Christ tells us in verses 12 – 14 the Spirit will lead us into all truth. That makes sense, the Spirit inspired the Scripture, 2 Timothy 3:14 – 17, 2 Peter 1:20 – 21.