*ahem* I mean, "yea, the deep things of God." (1 Corinthians 2:10)
"But God hath revealed them unto us by His Spirit: for the Spirit searcheth all things, yea, the deep things of God. For what man knoweth the things of a man, save the spirit of man which is in him? Even so the things of God knoweth no man, but the Spirit of God." (1 Corinthians 2:10-11, emphasis mine)
I don't know about you, but the notion that there are things to this life and our existence therein that are above and beyond our capacity to understand fills me with both excitement and wonder. Things like dreams and interpretations. Visions and prophecy and tongues. Spiritual gifts that are ours for the asking. That is, if our heart is right before God.
"For as the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts." (Isaiah 55:9)
Daniel (2:22) says that "He revealeth the deep and secret things: He knoweth what is in darkness, and the light dwelleth with Him." Daniel was uniquely blessed with the ability to interpret dreams. Nebuchadnezzar speaking to Daniel regarding a particularly puzzling and prophetic dream: "O Belteshazzar (Daniel's Babylonian name), master of the magicians, because I know that the spirit of the holy gods is in thee, and no secret troubleth thee..." (Daniel 4:9, emphasis mine)
Joseph had the same gift: "And they said unto him, We have dreamed a dream, and there is no interpreter of it. And Joseph said unto them, Do not interpretations belong to God? Tell me them, I pray you." (Genesis 40:8)
Paul, it seems, had a special corner on the spiritual. Granted, he was in a position of immense responsibility before the Lord, having founded many of the first-ever Christian churches as scattered throughout Asia Minor after Jesus commissioned him an Apostle. Much of the mores and maxims we as Christians have for the proper procedures governing spiritual matters came through Paul's pen. In his first letter to the Corinthians, fourteenth chapter, he touches on the topic of speaking in tongues. Writing to the Ephesians (1:17), he speaks of receiving from God "the Spirit of wisdom and revelation in the knowledge of Him". He exhorts those in Colosse to "walk worthy of the Lord unto all pleasing, being fruitful in every good work, and increasing in the knowledge of God." (Colossians 1:10)
Think about this: There are laws that govern every single aspect of the natural world and universe. From the fine points of vector calculus (which I don't even pretend to approach understanding) to the esoteric and ethereal laws of theoretical physics (hasn't CERN found the Higgs Boson yet? Actually, as of writing, they hadn't but the Physicists at the CERN supercollider in Switzerland did indeed find something resembling the Higgs Boson—the "God Particle" in July of 2012) to the reason for the northern lights. Everything, everything follows a pattern. A pattern that was put into place by God. Shouldn't it follow then, that the bedrock of reality—i.e. the spiritual realm—have the same fine-tuning as the physical, natural universe? If we understand God's character, then I believe so.
"The secret things belong unto the Lord our God: but those things which are revealed belong unto us and to our children for ever, that we may do all the words of this law." (Deuteronomy 29:29) I believe that God will reveal these things to us if He's called us to know them. One of the ways that we know is by our innate curiosity.
The spiritual is happening all around us all the time. And while we're not called (I don't believe) to stay solely focused on that to the neglect of the practical aspects of life, I do believe that the Holy Spirit wants to make us aware of things that affect us on a spiritual plane.
It would seem to me that the Holy Spirit is the last member of the Trinity that we as a church have yet to cozy up to. When Jesus labels the unforgivable sin as "the blasphemy against the Holy Ghost" (Matthew 12:31), I think that many Christians read that and are so scared of doing that very thing that they push Him to the periphery and go for long stretches without acknowledging Him one whit. I know I'm guilty of this. The sad thing about this kind of treatment is that it blurs into what Paul calls "quench[ing]" the Spirit (1 Thessalonians 5:19). This "quenching" of the Holy Spirit can in turn be tantamount to "griev[ing]" Him (Ephesians 4:30). And that's where things get scary.
As a kid, I was afraid of committing the unforgivable sin. As I shared my concern with my dad, he shared some watchwords of wisdom with me. He said that the very fact that I have a concern shows that I am in right standing with God in regards to this. And he also taught me that God loves me enough to see to it that I never get so far out of His leading and protection that I stray into the slightest possibility of commiting the unforgivable sin.
The Holy Ghost is first and foremost our comforter and our teacher (John 14:16, 26; 15:26; 16:7). He loves us as much as Jesus does, as much as does the Father. He's so gentle and He pervades all of Creation in every realm of existence (because of what Jesus did on the cross, I might add). Spiritual and physical. And God would have us as a body of believers be led of His Holy Spirit to receive the "deep things of God" that were spoken of by Paul in his first letter to the Corinthians.