(quote from RealReality.org/Real_Faith_and_Reason_Vol_3_-_Scientia.pdf)

The testimony of Jesus Christ is the Spirit of prophecy. Even if we just say Jesus is Lord, no one can sincerely make this confession unless that person is speaking by the power and authority of the Holy Spirit. Whenever we speak by the power and authority of the Holy Spirit, we proclaim Christ.

(end quote)