More precisely the doctrines of dualism:
grace-torture
godly-ungodliness
holy-unholiness
light-darkness
salvation-damnation
yin-yang
As Jonathan Edwards puts it:
It is necessary that there should be evil, because the display of the glory of God could not but be imperfect and incomplete without it.
How to make John Calvin’s favorite drink:
1 part Gnostic dualism
1 part NeoPlatonism
4 parts Christian doctrine
Mix thoroughly and serve with a plate of self-contradictions. :-]
God is Open 
More precisely the doctrines of dualism:
grace-torture
godly-ungodliness
holy-unholiness
light-darkness
salvation-damnation
yin-yang
As Jonathan Edwards puts it:
It is necessary that there should be evil, because the display of the glory of God could not but be imperfect and incomplete without it.
How to make John Calvin’s favorite drink:
1 part Gnostic dualism
1 part NeoPlatonism
4 parts Christian doctrine
Mix thoroughly and serve with a plate of self-contradictions. :-]