What does the Bible say about the Holy Spirit's ministry?

The ministry of the Holy Spirit is pivotal in the New Testament, particularly highlighted in John 14:26, where Jesus says, 'But the Comforter, which is the Holy Ghost, whom the Father will send in my name, He shall teach you all things, and bring all things to your remembrance whatsoever I have said unto you.' The Holy Spirit's role is not only to instruct but also to comfort and guide believers in their walk with Christ. His work encompasses inspiring the Scriptures and applying the truth of Christ's redemption to the hearts of believers.