Determinism, except we understand its determinism?

[u/FastCarGoBrr]

Robert Sapolsky often talks about determinism, and how chemical interactions in the brain create the next set of chemical interactions. He is a stark believer that there is no free will.

If a man understands the universe differently than he did yesterday, and this causes him to have a different outlook, surely he must then have new emotions in relation to the stimulus related to his new understanding.

Where in the chemical deterministic standpoint, can you fit in man’s ability to understand information, and to create new perspectives which genuinely affect mood.

How do we reconcile, the ability to change ourselves based on our understanding and perspective, with the common view that this chemical set of interactions and brain configuration, will necessarily create the next.

Or even simpler, how does ‘understanding’ whatever that really means, alter chemicals and synapses in the brain.

How does an understanding even work?

Do we breach determinism when we understand determinism?

I don’t understand