"The material, sensuously perceptible world to which we ourselves belong is the only reality.... Our consciousness and thinking, however supra-sensuous they may seem, are the product of a material, bodily organ, the brain. Matter is not a product of mind, but mind itself is merely the highest product of matter." — Karl Marx

This gets explored a bit in The Talos Principle and it's sequal. Working on the 2nd one now, it's been fun

There's a lot of water and ions (IONS!) besides that lump of fat.

I'm still rooting for Idealism or the immortal soul to somehow be a thing.

Go Banana!

I've never understood why people think the most sophisticated and complex technology humans have ever been aware of is too mundane just because we have scratched the surface of understanding it.

It’s OK. Consciousness is but a brief anomaly in the vast sea of time.

Action potential doesn't do thinking. Thinking happens at neuron junctions and that shits chemical and analogue. The electrical part just moves the data to the next synapse. There are some gap junctions but those aren't really associated with thinking.