Psalm 139:7
Whither shall I go from thy spirit? or whither shall I flee from thy presence?

1 Co 2:16
For who hath known the mind of the Lord, that he may instruct him? But we have the mind of Christ.

Isaiah 40:13
Who has directed the Spirit of the LORD, Or as His counselor has informed Him?

Romans 11:34
"Who has known the mind of the Lord? Or who has been His counselor?"

Eph 4
22That ye put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts; 23And be renewed in the spirit of your mind; 24And that ye put on the new man, which after God is created in righteousness and true holiness.

The Holy Spirit is not an angel, or a third being.

It's Christ's presence in us, his mind, which works upon our own minds, and hearts, and bears witness to us, that we are Sons of God, in Christ.

1 Corinthians 15:45
And so it is written, The first man Adam was made a living soul; the last Adam was made a quickening spirit.