“However, when He, the Spirit of truth, has come, He will guide you into all truth; for He will not speak on His own authority, but whatever He hears He will speak; and He will tell you things to come” – John 16:13

All things that Christ had heard from His Father He made known to us. He kept to them. And now the Spirit takes of the things of Christ, and of nothing else. Do not let us strain at anything new. The Holy Ghost could deal with anything in heaven above, or in the earth beneath-the story of the ages past, the story of the ages to come, the inward secrets of the earth. He could do it all. Like the Master, He could handle any topic He chose; but He confines Himself to the things of Christ, and therein finds unutterable liberty and boundless freedom. Do you think, dear friend, that you can be wiser than the Holy Spirit? …The Holy Spirit still exists, and works, and teaches in the church; but we have a test by which to know whether what people claim to be revelation is revelation or not: “He shall receive of Mine.” The Holy Ghost will never go farther than the cross, and the coming of the Lord. He will go no farther than that which concerns Christ.

Beloved friends, I scarcely need say to you, do keep the existence of the Trinity prominent in your ministry. Remember, you cannot pray without the Trinity. If the full work of salvation requires a Trinity, so does that very breath by which we live. You cannot draw near to the Father except through the Son, and by the Holy Spirit. There is a trinity in nature undoubtedly. There certainly constantly turns up the need of a Trinity in the realm of grace; and when we get to heaven we shall understand, perhaps, more fully what is meant by the Trinity in unity. But if that is a thing never to be understood, we shall at least apprehend it more lovingly; and we shall rejoice more completely as the three tones of our music shall rise up in perfect harmony unto Him who is one and indivisible, and yet is three, for ever blessed, Father, Son, and Holy Ghost, one God. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/2213.cfm