Why insanity?? if the spirit is of a nature you don't know about...
Don't know about? All substances fall into only two possible categories regarding materiality (leaving aside other properties for the moment):
(1) Intangible
(2) Tangible
Where does the evidence point?
Time for a sanity check. 100 billion people have lived and died since the world began. So we have approximately 100 billion EMPIRICAL cases of the following facts:
(1) Thought is a physical process, occurring primarily in the brain if you're human. To deny the physical nature of thought is to deny the existence and role of the human brain in our daily lives.
(2) Nobody just 'knows' stuff magically. It has to be learned over time, perhaps with the exception of those things ingrained into our consciousness by our brains well-designed by God.
(3) Such learning began with our first thought, when we 'awoke' unto consciousness.
Traditional thinking, on the other hand, postulates a model CONTRARY to the above, something that flies in the face of EVERYTHING we've known and seen for the last 6,000 years.
(1) God is said to be a person who never engaged in a learning process. He knows stuff magically.
(2) For the divine soul, and the human soul, thought is a non-physical process.
(3) God never had a first thought.
Inherent knowledge? Unlearned? It's understood to be PART OF HIS NATURE (i.e. part of his definition). This leads to two contradictions of Scripture:
(1) If omniscience were inherent to God, inescapable for Him, part of His very definition, an Incarnation as an ignorant babe would be a logical impossibility.
(2) An inherently omniscient God would be incapable of LEARNING something new. But in Jesus we see a God who CAN and DOES learn.