Let's assume for the moment that God decides what is good and what is bad.
Does He 'a' choose what is good because it is obviously good or 'b' is it good simply because He says so?
If 'a' then what is good is independant of God and He has no choice but to accept it as good.
If 'b' then the definition of what is good is arbitrary - God could decide that child abuse was good and it would be because He said so.
Clearly this is ridiculous because we all recognise child abuse to be a bad thing and that is why God would never label it as good. To recognise this however is to accept that we do not need God to determine for us what is good and what is bad.
(Genesis 3:6-7) . . .So she began taking of its fruit and eating it. Afterward she gave some also to her husband when with her and he began eating it. 7Then the eyes of both of them became opened . . .
God bless that snake!