Everything happens for a cause. The cause must be sufficient to explain the outcome: a firecracker cannot blow up Hiroshima. A work of art cannot be created by a non-deliberate or natural or blind because art is deliberate, insightful, meaningful. If it comes into my mind from somewhere, that someone from whence it comes cannot be my mind, but it has to be something like a mind, something (or, rather, someone) who is conscious and capable of artistic creative thought. The unconscious mind does not think since thought is consciousness: the two words mean the same thing.

The only two possibilities are that these inspired thoughts arise in me from a human mind or a divine one. If it were a human mind, there would be a physical cable or channel physically carrying the nerve impulses into my brain. Which is absurd. Therefore, etc., QED.