The mind is very active, and when it chooses to be separated and conflicting it can only perceive. It does desire to know, and chooses carefully out of uncertainty when it perceives. Even when we think about the process of our mind body spirit , we see it in a physical sense, often relating it to our brain, rather than our connection to the universe.
Mind body spirit is union while in this world, and You as the One whole Mind of God are the Trinity eternally.
God the Father, the Son, and the Holy Spirit are each a level in the whole Mind of God, the Trinity explained, and are the only levels capable of Unity.