well technically the Holy Spirit’s presence has been continuously there — the Holy Spirit is the reason that the Church was able to spread and convert the Roman Empire, a large chunk of the Persian empire - spread Christianity to Mongolia and to India by the 6th century.
The Holy Spirit also drove the spread of Christianity to Germans, Slavs, Celts, Norse, Magyar etc. etc.
The attribute changes in society are a direct result of the increased presence of the Holy Spirit.
When the strength of the Holy Spirit increases it also feels like we are burning in hell due to the high energies effect upon sin. It is a cleansing or refining fire that raises us up as the heavy sin is remove from us.
It is much simpler than most make it. Feel and experience it, as you can’t think your way through the process.