This sermon explores the nature and role of the Holy Spirit as the third person of the Trinity, emphasizing His function as our advocate, comforter, and empowerer. Pastor Joe Fant explains how the Holy Spirit dwells in believers, gives life, comforts, empowers, enlightens, brings peace, and sets us free from sin. The sermon connects the ministry of the Holy Spirit to Jesus' promises to His disciples and applies these truths to the Christian life today.