How do you know God is the good one and Satan is the bad one?

The truth is you can never truly know. The entire book could have been divinely inspired by Satan and nobody would know the difference.

It's obvious.

See Exodus 34:6.

1 John 5:19

By studying both sides, it's natures common sense

Its a choice between goodness and fear , goodness = evolutional fitness , fear = devolution

search for goodness and string theory

Because GOD destroys the wicked and saves the righteous. If you believe that he should reward the wicked and destroy the righteous, then that makes you the evil one.

God says:

Jhn 8:44 Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.

That's the way some people imagine it.

if you practice there teachings you can expierience it for yourself who is the good one and who is the bad one

I was told by God that it is so.

It's in a book.

So it must be real.

They believe the propaganda of the church.