when you say OMG and thank god. Is there a scientific reason behind it? Every person whatever religion in this world say these two words. why would you celebrate culture if there is no scientific reason behind it? If you don't believe anything in this world, then your thoughts won't be believed by anyone too. सब जना मुखमा राम राम बगलीमा छुराहरु.
These might not be 100% true but there is some percentage truth in these saying.