Contradictories in real things must be considered according to how they are divided.
Contradictories in the first principle of thought but be considered according to how they are united, i.e. so far as one enters into and is intrinsically constitutive of the intelligibility of the other. We can only understand being in such a relation to non-being, non-yellow in such relation to yellow, etc.
But thought is essentially and in its totality under the principle of contradiction.
Therefore thought is essentially and in its totality divided from real things.
Thought and real existence exist “analogously”, but the word blunts the shock of what we mean: we mean that if we describe all that exists but do not mention thought or mind, we have left nothing out; and if we describe all that exists but only mention thought or mind, we have left nothing out.
That there are causal pathways from thought to real things and back again is necessary and evident, but causes need to be understood formally as outside the totality of what is caused. Causes that are in one genus or order with their effects are causes only materially.
We can make some sense of what it is for thought to “exist”, even if it does not add some new thing to the real world. But we cannot at all make sense of what it is for thought to cease to exist. It doesn’t have the sort of existence/ non-existence binary that typifies the things I know.