[xone]

Is the Trinity beyond human reason, or might it be revealed to the human spirit by God the Holy Spirit,

The question you pose really isn't, both parts are correct. The Holy Spirit is the 'author' of true doctrine.

[esquirette]

Nice.

[Cvengr]

Agreed, but to the soulish man, the Trinity is beyond reason, while to the new man, through faith in Christ, God the Holy Spirit is able to provide the work of faith in us, revealing the Trinity to our reason.