A big and complex reaction of chemicals.

Btw: REAL control. Real control is a fake of the brain. You can tell a computer aswell that he is "aware" of his doings. But check this out: Of course we must believe REAL control, otherwise no one would be responsible for anything, and laws wouldn´t work.

EDIT2: "So if you think that you are only a piece of material, that after death is lost forever, why do you keep living if you dont have nothing to win with this?

Hard question inst it?"

We are all humans and we share the same thoughts. IF you can think we are all a huge set of chemicals, you still can´t believe it because your brain connections are set to the state to believe you are alive. If it would be different you would be dead, like suicide or accident because you got lazy about your live.
Most people of course have strongly set their brain to the state, that they are a lifeform, because it feels good. And otherwise humans wouldn´t have survived. There are for sure lifeforms who didn´t had that feeling of beeing alive, and they all died pretty quick, so we don't know them.