But here lies the problem. Unless we obtain some kind of knowledge from another being, we probably won't know what the universe is for, why it's here and why things are the way they are. Even then, would that being's information be credible, would we have any other alternative? We can speculate all we want, but I've gotten frustrated, moody and even depressed doing deep thinking like this.

I warn people who are new to this kind of thing. Be careful, the mind is a dark place if you don't know your way around the deeper aspects of it. This kind of thinking can't be taken lightly, you either give it your all, or nothing, and once you've explored the deepest questions and the darkest answers, you will be changed forever and there's no going back. Thinking like this will take you on the most hidden and darkest roads. It will lead to long chains of thought that comprise of convoluted and questionable theories. You can also scare yourself pretty bad if you let your mind have control over you. Just a warning to people who are just beginning to explore the really deep questions and areas of the mind and universe most people would rather not dwell upon.