Stephen Hawking thinks according to laws of physics the universe could have happened on its own and we don’t need a god to create it. According to him and many other scientists there is a theory that can explain every existing law of physics and if we are able to understand that theory we have understood the mind of God.
I think all the scientists jump the gun when they denounce the existence of some unknown power that we often prefer to term as “God” at the drop of a hat. You cannot say things just happened. I know, I may have a limited knowledge of time and I may not be aware of the true concept of what is beginning and what is end and in what direction moves what, the commonsense says there has to be something or someone eventually. You may not like to call it God but whatever triggered the current universe must have some kind of origin. It’s like, although you can say that a marble will roll down a slope automatically, someone puts that marble at that place from where it can roll down. So there is some force that somewhere initiated something that resulted in the kind of universe that we currently have.
Scientists perhaps get mixed up with that original “God” with mythical and prophetic worldly gods. For instance, Christians say that God created this world in “n” days, Muslims say something else and Hindus have their own idea of creation and destruction. These gods may be just works of fiction or delusion but it doesn’t mean that there is no ultimate power. It may not be human or something we can relate to. It can be a complex blob of intelligence that just floats around creating universes, or anything.
With our limited understanding it won’t be humanly possible to go to the beginning of things because if you actually think there can be no beginning because there is always something before the beginning. Something like, before you were born there were your parents and before they were born there were their parents and before our ancestors were born there were apes and monkeys and before apes and monkeys were born there were other forms of lives and before those other forms of lives came into existence there were some chemical reactions and before those chemical reactions there were some chemicals that caused some other reactions, so on and so forth. It doesn’t seem to end and I don’t think it can ever end because before everything there is something else. This seems so bizarre that even before God there has to be some super God that gave rise to the god that created the universe.
Maybe that’s why we come up with simple explanations and routine denials because once you start thinking about that literally, there is no end to it. That’s why we talk of the origin of the universe or the big bang theory and were normally don’t talk about what was there before that.