@FuzzySpider: Oh, I am well aware that I am quite limited. But if what I think (which is, I guess we can agree, what my brain thinks) is determined (rather than merely influenced) by chemistry or not, it still is what I do think.
And it is not choice in the sense that I can choose to eat a sandwich rather than a spaghetti. As I wrote above, it was reasoning rather than choosing which led me to that conclusion, the loss of meaning of the concepts of god and religion themselves.
Reasoning is still just brain chemistry. It is still just ultimately physics. You have no more control over your ability to reason than you have over your ability to not freeze if you are placed upon the surface of Pluto.
To some extent yes - to another extent other no.
That's why I called Buddhism "meds" .. and other meds, too.
You still do have the choice to expose yourself to such outside influences or not. You can build your resilience, you can reprogram your thinking actively to some extent.
Science now even linked "character traits" like introversion to things like dopamine reception in the brain. But even knowing you have certain physical limits does not mean you can't expand them trough practice and repetition.
The choice to reprogram your thinking also comes about because of brain chemistry. Active thinking is just the firing of neurons and chemical signals taking place. The decision to use practice and repetition to alter your patterns of thinking is merely the result of brain chemistry which is just physics - you were compelled by nature to do it - and the "choice" was an illusion.
As I say, it's easy enough to prove. Watch this video from a minute in. That mans behaviour is being determined by the condition of his brain, isn't that so? But would it be possible to simply resist the effect of the narcotics and not be so completely freaked out?
Of course not. But why? Because your brain is not the special place we all think it is. It is not removed from physics. Everything taking place in there right now is occuring because of cause and effect which, if sophisticated enough models could be devised, could be easily predicted. It's just as rigid, physical, corporal, and unyielding as stone. Much more complex, true, but no more able to alter its fate.
At least that's what the science says.