“For example, in physics, one of the first things you learn is that energy never, ever ceases to exist.”
True.
“Energy can only be transformed.”
Or dispersed.
“Well...in a way, this supports the theory that when human beings die, they cannot cease to exist. Where does the energy go?”
Right now, my computer has a lot of energy organized in a manner to make a web browser. If i turn it off, that energy doesn’t stop existing. But it does go out the grounding wire. It stops having the shape of a web browser. It stops having the memory of the words i typed or the sites i surf to.
Energy can exist independently from the physical envelope that gave it a shape, but it never holds that shape without the physical envelope.
There’s no medium for a soul to exist, retaining the information of a personality independent of the body.
“The body is physically failing, but the soul survives until the last second of life”
And you have a reason for anyone to think this is a fact, huh?
“(and is sometimes brought back after a few minutes through modern medicine).”
That’s not bringing the soul back.
That’s restoring the normal function of the heart and brain and the other organs. No need at all for a soul to almost escape, then come back…
“Where does the energy of your thoughts go?”
The bits stop moving through the nervous system, then are released as those parts rot.
“It cannot just disappear in a snap.”
Yes it can. Discharge a capacitor, like working inside a Cathode-Ray monitor, then tell me where the energy went.
“That's the most absurd thing I've ever heard.”
You’re trying very hard to say that your superstition is justified by what science you know. But you’re wrong. Science actually tells us that the soul is an absurd concept.