“And he that searcheth the hearts knoweth what is the mind of the Spirit, because he maketh intercession for the saints according to the will of God.” (Romans 8:27)
One of the great axioms of Scripture is that the triune Godhead is not three gods, but rather “the LORD our God is one LORD” (Deuteronomy 6:4). Having just given the wonderful insight in the previous verse that the Holy Spirit helps our “infirmities” by transmitting our inexpressible prayers directly to God, the Creator now responds that the inseparable and omniscient triune Godhead already knows that the indwelling Holy Spirit communicates for the “saints according to the will of God.”
This is no new truth. “But God hath revealed them unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God” (1 Corinthians 2:10). The Bible abounds with this fact. “The LORD searcheth all hearts, and understandeth all the imaginations of the thoughts” (1 Chronicles 28:9). “Shall not God search this out? for he knoweth the secrets of the heart” (Psalm 44:21). “God is greater than our heart, and knoweth all things” (1 John 3:20).
It is no wonder that God knows the “mind of the Spirit.” The core ministry of He who is “the Spirit of truth” is that He will “guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come” (John 16:13). HMM III