That's in the OT. In the church age, the Holy Spirit is given to ALL born again believers.
2 Corinthians 1:21-22 And it is God who establishes us with you in Christ, and has anointed us, and who has also put his seal on us and given us his Spirit in our hearts as a guarantee.
2 Corinthians 5:4-8 For while we are still in this tent, we groan, being burdened—not that we would be unclothed, but that we would be further clothed, so that what is mortal may be swallowed up by life. He who has prepared us for this very thing is God, who has given us the Spirit as a guarantee.
So we are always of good courage. We know that while we are at home in the body we are away from the Lord, for we walk by faith, not by sight. Yes, we are of good courage, and we would rather be away from the body and at home with the Lord.
Ephesians 1:13-14 In him you also, when you heard the word of truth, the gospel of your salvation, and believed in him, were sealed with the promised Holy Spirit, who is the guarantee of our inheritance until we acquire possession of it, to the praise of his glory.
Ephesians 4:30 And do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption.
If you think the Holy Spirit is helping you understand what you read, and you have not had an earth-shattering, entirely unique, draining, and unmistakable supernatural experience, you are mistaken.
On the contrary, He does do that in the life of the born again believer. Spiritual truths are spiritually discerned and can only be apprehended through the enlightening work of the Holy Spirit.
Nor does someone need an "earth-shattering, entirely unique, draining, and unmistakable supernatural experience" to be led by Him or to know His presence. The Holy Spirit can speak with a still, small voice.
“Nor does someone need an “earth-shattering, entirely unique, draining, and unmistakable supernatural experience” to be led by Him or to know His presence.”
Clinging to assumptions where one has no experience is risky at best.