Your Brain Trust: The Holy Spirit

Every believer possesses the Holy Spirit the moment that they are born again:

Salvation is a matter of confession with the mouth through agreement in the heart:

"That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved." (Romans 10: 9)

The faith that we need to believe comes in the word that we receive:

"So then faith cometh by hearing, and hearing by the word of God." (Romans 10: 17)

There is no confession with the Holy Spirit.

"Wherefore I give you to understand, that no man speaking by the Spirit of God calleth Jesus accursed: and that no man can say that Jesus is the Lord, but by the Holy Ghost." (1 Corinthians 12: 3)

This same Holy Spirit inspires every believer with all knowledge:

"But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you." (John 14: 26)

John confirms the wisdom granted to us through the indwelling Spirit:

"But ye have an unction from the Holy One, and ye know all things." (1 John 2: 20)

Then John writes:

"But the anointing which ye have received of him abideth in you, and ye need not that any man teach you: but as the same anointing teacheth you of all things, and is truth, and is no lie, and even as it hath taught you, ye shall abide in him." (1 John 2: 27)

The second part of this verse makes it very clear: we do not need others to teach us, so much as permit the Holy Spirit to guide us, whether by asking Him directly (James 1: 5) or through reading the Word.
In fact, we have the mind of Christ:

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

Our brain trust, therefore, is the Holy Spirit, who forms Christ within us (Colossians 1: 27), who in turn is made wisdom to every believer (1 Corinthians 1: 30)