It means lots of things to different people

Gods word is spiritual ,,,but an unsaved mind is carnal
So Gods word can be read like a book and good things come from it as with any good book
But filled with the spirit of the Living God ,,
It can show you things you never imagined
And teach you to stop trusting your own understanding that says thats impossible ,,and trust God ,,
2 verses support that ,,but only words to a mind still carnal

1 Corinthians 2:14 King James Version (KJV)
14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.

Jeremiah 33:3 King James Version (KJV)
3 Call unto me, and I will answer thee, and show thee great and mighty things, which thou knowest not.

I like this translation better

Jeremiah 33:3 Amplified Bible (AMP)
3 ‘Call to Me and I will answer you, and tell you [and even show you] great and mighty things, [things which have been confined and hidden], which you do not know and understand and cannot distinguish.’

It has no language, no historical beginning or birthplace, no one is "Spiritual" but many seek spirituality. I experience it in simple way's, a warm touch, the lick of my kitty in the morning, the reverberation of a a drum beat, the desire of kindness, empathy, tolerance, generosity, and a untold thousands of other things we cannot will not understand until, (possibly) we shed this cumbersome sack of human flesh and pass through the veil.

Out of body experiences. Out of "America" out of Earth. Out of Western history maybe 🤔