I wouldn't call the human body/mind a machine, I think that the word "machine" fails to deliver the mechanism that is the human being.

A machine would require some sort of man made input, it doesn't just operate on it's own, saying that the human is a machine (or robot) is giving the impression that we are slaves, that there's always something or someone behind the body putting in input.

Well it's close, the human organism really is a complex being, and in fact it is on automatic, it really is doing it's thing.

But here's the thing.

There's nobody controlling it, there's nobody providing the input.

The only input it gets is from it's own environment, without the environment there would be no human body, and vice-versa .

"But who's doing life then? There MUST be someone behind all this, otherwise this wouldn't make any sense whatsoever".

Is that true?

How do you know it wouldn't make any sense? how do you know whether what you think as "sensible" is true or just a load of horseshit? really, how do you know?

You've been conditioned since you were born to think that way, it wasn't your conditioning, it was society's conditioning, so how can you be sure that your pattern of thought is the right one?

Just because everybody thinks that way doesn't make everybody right, actually, it's pushed everybody down the dark black well of delusion, and you're part of it.

The truth is that it's not true, there is nothing doing life, there is no God sitting on a gigantic throne looking down on people and writing their life plan on a piece of paper.

Cause and effect, it's flawed.

We think that since there's a body doing shit, then there must be something doing it, and in the same way we think that since everything around us exists, then there must be some magnificent entity doing that.

We created a false story, and we became slaves to our own imagination.

Life exists as it is there is no doer of life.

Then if there is no doer to this body, am I just a robot?

Two points:
1st point is that there is no you to be a robot, anything you label as you is just a content of thought that has no substance in reality since it is a mere projection of the brain.

2nd point is, the human organism is not a robot, a robot doesn't feel, a robot doesn't create illusion, a robot doesn't imagine shit and just blindly believe it, only humans can do that, and they do a fantastic job in it.

The human experience is an automation, environment affects body and stimulates it, that stimulation moves the body, makes the mind aware.

But it's all happening on it's own, and we don't exist in it.

Take a look.