so where do thoughts come from ? and what do they consist of ?
A big question.
I know thoughts can generate brain activity, but there is a question over how this brain activity can be interpreted as conscious thought.
Here's some of my thoughts (sorry
) on the matter.
First off, thoughts take many forms, so generalisations are going to be suspect.
Secondly, thoughts
are brain activity, there can be no doubt about that.
Thirdly, any thought of whatever form has an origin; it doesn't come out of nowhere. Quite often we can quite simply recognise that one thought triggers a subsequent thought; one thing leads to another. However quite often the causal origin of a thought is obscure to us, the reason being that novel thoughts emerge into conscious mind from lower levels of consciousness, picking up detail and form and definition as they rise from the nebulous emotion centres of the upper brain stem into higher cortical areas.
Fourthly, we don't consciously choose which thoughts to think. Thoughts
happen to us. Just as we don't choose to shiver when we go out into the cold, thoughts occur
to us, we don't consciously instantiate or create them.
Dreams are a form of thought; they are a form of conscious thought that happens while we are asleep, but as we are sleeping the mind is not applying it's normal level of reality checking that we associate with regular waking conscious states; hence dreams are often unhinged, unconstrained.
All of this is consistent with a deterministic model of mind. We do not make active choices in conscious mind, all thoughts emerge from lower levels, and all thoughts and choices are consequent to prior events and conditions.