“Who can fathom the Spirit of the Lord, or instruct the Lord as his counselor?” Isaiah 40:13
Understanding the Holy Spirit completely may not be possible, but we’re going to get to know Him a bit more and since the Bible does say a lot about Him, there’s quite a bit we can find out.
The first thing to establish is that the Holy Spirit is not an “it.” He is not a power to be harnessed or an impersonal force. He is a relational being. The Holy Spirit is one person of the Trinity, One God who eternally exists as three distinct persons – father, son, holy spirit – who are each fully and equally God and in eternal relation with each other. Persons does not mean human beings. Only Jesus became human. Person means that each member of the trinity thinks, acts, feels, speaks, and relates because they are persons and not impersonal forces.
We are all susceptible to falling into the trap of trying to harness the power of some force that we refer to as the Holy Spirit rather than being in relationship with him as God. Without a good understanding of who He is, we will ignore the Spirit while trying to relate to the Father and the Son. That’s like trying to be in a relationship with some of the people who live in your home while ignoring others. No one thrives in that scenario.
The Holy Spirit is not some feeling that we get on Sunday morning, or a ghost, or something that makes us shake and shiver. He is a personal, relational being with whom we can communicate, find comfort, and abide.