Holy Spirit

Hello Rabbi
After the responsa "Who wrote the book of Deuteronomy" in which I did not understand why the rabbi answered two questions, the rabbi answered me:
"Not true. The Holy Spirit is indirect prophecy (which in a certain sense exists even among sages who are not prophets). Moses in the Holy Spirit is a human formulation. The Torah from Sinai was given in the language of God, the Blessed One." I would be more than happy to hear what the Rabbi thinks about the concept of the Holy Spirit, [what does indirect prophecy mean?] because as far as I understand it, it is called "from heaven." Thank you.