Chapter 6 of Knowing God by J.I. Packer is called “He Shall Testify”, and is about the Holy Spirit.
It is the sovereign prerogative of Christ’s Spirit to convince men’s consciences of the truth of Christ’s gospel; and Christ’s human witnesses must learn to ground their hopes of success, not on clever presentation of the truth by man, but on powerful demonstration of the truth by the Spirit.
In our witness: do we remember that the Holy Spirit alone, by His witness,can authenticate our witness, and look to Him to do so, and trust Him to do so, and show the reality of our trust, as Paul did, by eschewing the gimmicks of human cleverness? If not, we dishonour the Holy Spirit.
Grace and Peace