How do we know the Spirit is a witness of Christ?

The Spirit’s witness is integral to the ministry of Christ. In 1 John 5:6, the Spirit bears witness because He is truth. This witness was exemplified at Christ's baptism when the Spirit descended upon Him, confirming His divinity and mission. Today, the Spirit continues to bear witness through Gospel preaching, ensuring that the truth of Christ is made known. Fellow believers experience this divine testimony within themselves as they respond to the Gospel through faith, signifying the Spirit’s active role in drawing people to Christ and affirming their new identity in Him.