ISUN as an acronym ( Incomprehensible System of Universe and Nature=ISUN) is more descriptive and complementery term which can not be terminologically argued by both theists or atheists. Considering as a system is totally correct even it can be argued that it is some sense chaotic system but also in order some sense! If it were not we would not have natural sciences at all which humanity learned by scientific methods. More you learn something scientifically also you learn simultaneously more things those you do not know ! Like Zeno's paradox it is an infinite. Incomprehensibles are infinite compared to very limited comprehensibles achieved by the civilization history of humanity !
Therefore instead of the word God, the word ISUN is more logical terminology.