God is not obligated to create. Yet He has chosen to create in such a way to put His full being on display and exhibit both his wrath and His mercy. This was no obligation. God could have chosen to create a world where sin never entered into creation at all. Why He did or did not do so....well, I don't know, except that God did it this way. My deeper questions which still linger are as follows: WHY did God do it this way? Obviously because it was the BEST way. If I were to say that God chose to create and allow the Fall in order to fully display His wrath and mercy, and that God chose this reality because it was the BEST way, than I have to ask if God is obligated to always follow the best way. Is He? Could God have created a reality that was sub-par or lacking in some way? And if so, would this be a sort of obligation for God to create in order to fully display His wrath and mercy? Was there a way for sin NOT to enter the world AND for God to fully display His wrath and mercy to the universe? And if there was, why didn't God choose it? Is God bound within this dilemma of, "Ugh.....I can either have one of two choices but not both....I can either allow sin and fully display my being in a maximal way, or else I can disallow sin and endure having my being not fully be expressed...." And if not, what is the way out?