By St. Nikolai Velimirovich
"The Spirit of truth that proceeds from the Father, He will testify of Me" (John 15:26).
God's Son sent God the Holy Spirit into the world to testify about Him until the end of time. "He will testify of Me."
How will God the Spirit testify about God the Son? God the Spirit will testify in many ways:
By attracting the souls of men to Christ's Church;
By revealing to them the meaning of the Holy Scripture;
By leading their minds to the commandments of Christ;
By giving warmth, freshness, power and gentleness to the words of Christ;
By converting repentant sinners into righteous ones;
By fulfilling all the promises and prophecies of Christ upon men and upon nations and upon God's Church;
By strengthening the Church of Christ and holding it firm against all the tempest of times and all the evils of Hades and men throughout the ages of ages.
The Spirit which works in these and many other similar ways is the Spirit of God, the Spirit of Truth, the Spirit of Good, Life-creating and All-powerful.
Not one of Christ's words goes against the Spirit of God nor does the Spirit of God go against a single word of Christ. That is why when the Spirit of God pleases to enter into the heart of man, He becomes alive and becomes a true witness to all that Christ said and did. Then, man believes joyfully and unwaveringly. For how would he not believe the greatest and the most enduring Eyewitness and Participator of all the words, all the miracles and all the works of Christ?
That is why, brethren, let us pray before all and above all that this Eyewitness and Participator, the Holy Spirit and All-Powerful, settle in our hearts so that our faith may become alive, unwavering and joy-creating.
O God the Holy Spirit, the Spirit of Truth, come and abide in us. Amen.