Hopefully making theology simpler to understand! (2 Corinthians 1:12)

But you will receive power when the Holy Spirit has come upon you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth.”
Acts 1:8, ESV

The greatest reason we receive the Holy Spirit is to share the Gospel: the life, death, and resurrection of Jesus for our forgiveness.
If anything is taught as more important, that is a false Gospel from a false spirit.