There are only two kinds of people in the end: those who say to God, 'Thy will be done,' and those to whom God says, in the end, 'Thy will be done.'
- C. S. Lewis
I have long believed that there is only one God. There can only be One; Plato eons ago rightly pointed out that perfection implies singularity, as multiplicity must infer defect. To wit, complexity must allow for great error because there are so many parts of it. There's more to go wrong. Conversely, One Whole Something must be essentially simple so that nothing can be wrong with it.
Ignore for the moment any pleas within your mind which may ask, so which God is God? I am merely establishing that there can only be one. Christ, Yahweh, Allah; Animism and Mother Earth: we can deal with all that another time. What I am concerned with here is how this truth affects us in our day to day actions.
When we discuss morality it often seems to devolve into an us against them rant. "Who made you God?", we may often be asked. The reply, "Who made you?", generally is left unasked, yet is just as fair. Be that as it may, the overall implication is that that other person doesn't have to listen to you because you aren't the final arbiter of right and wrong and, further, that maybe there isn't actually a God for us to bother about anyway.
That is dangerous on two fronts. The first is that you never, ever want to even broach the idea that you are God. The second is that it begs that question of who is. To the former, what kind of God would you be if you did in fact call the shots? Could you stay good with all the power that implies at your control? To the latter, if there is a God who can make those calls, hadn't we best find out who He is and what He wants? For surely our poor opinions and actions would pale next to His.
Still, God allows us some share of that power. He will, as Lewis says above, tell you 'thy will be done', and cast you off. He will allow you your choice on the ultimate matter: to be with Him or not. You can be the god of your own destiny.
But ask yourself whether you would like where the trail must lead.