What defines me? The things I do? The thoughts I've had until now? The thought I'm having? My experience? Chemicals in my brain?

Who am I?

Does it even matter?

These quesitons always come back to me like it's a thing I need to figure out before I can be truely happy, ... mostly at moments when I am depressed or frustrated about life.

The basis facts will build up my argument are,

- Human bodies are all chemical.

- There are no spiritual souls.

- Human brains are computers good enough to function our bodies as they are.

Every experience I had since birth changed me little by little. Foods change my mood, hunger, thirst, and body in long term. My thought is directly affected by my body and everything around it.

Am I still the same person as before I eat something?

Am I the same person as before I go to sleep?

Is my memory so artificial that it can be turned on and off like computer?

A computer is still the same one after it restarts.

Am I that indifferent than a computer?

Am I that just a thing waiting for inputs to function and change?

What if I don't want to change?

I am scared. I don't want to lose what define who I am now ... to lose all the things that built up until now that makes me me.

I am depressed now. I can go to sleep and wake up brighter, but that won't keep these depressions from coming back.

What can I do about this thought? Does it not matter to know the answer?

...

A computer can switch its memory with another computer and their identities are switched. They can switch other parts and their abilities would be switched.

Does this mean my identity is my memory? And my ability to do things is my brain and body?

So I'm just a memory in a form of cellular circuit stuck in a shell? A shell that absorbs everything to change me.

Even if full-cyberization is real, I would still be in some other kind of shell.

Is there really no point if our shell takes no inputs? We would be a read-only flash drive, with nothing to read... or just some book.

Saying it like this brings me to think more about living. Because the answer is if we don't want to change, we have to die.

(Staying depressed is also a change, it will lead to something though slowly and with constant headache.)