Absence Of God

I heard Einstein once said that cold is the absence of hot and evil is the absence of good. If this is so, then Satan is the absence of God. What I don’t understand is, If Satan is the absence of God, why did he appear? I mean, wasn’t Job a man who “feared God, and eschewed evil.”? It’s the same thing that happened with Abraham, there was no reason for God to test him and here, I believe is happening the same.
God has shown to be a double-faced character. He makes people believe he is all-mighty and feared but his actions make us think he is unsure about himself; it’s like if he was the one that feared that humans would forget him. If this did happen, if humans were to forget God, then there would be absence of him and Satan would appear.
I’ve hit a dead end. How could there be absence of God in Job? Is there absence of God in everybody? Am I jumping to conclusions and leaving the text behind? Reading the bible us somewhat difficult, especially because I was born to believe in Christianity and have to leave everything they have told me to believe behind. I guess I have to start looking at God as a character from another story, just as I would look at any other character from any other text… Am I?