Religion, surely a delicate subject. Fulfills a lot of people but makes most of them intolerant. Over the history has done more harm than good. Today, we have access to information easier. We know all the horror that religion has caused in past and the wars it causes until now. We have acquired the scientific rationale that demands that everything should be proved. We know books are written by men. And along with all these facts comes a difficult question. To believe or not to believe in God? Please understand that I'm referring to God in a wider way, not the judeo-christian. Why so? Because there are thousands of religions and thousands^thousands ways of defining God, since even when people are in the same religion sometimes they think differently. So I'd rather not take sides of anyone and when I say God please read any kind of deity you wish.
Starting off with the why not, there are several reasons. Sometimes life sucks, a 9 year old sweet little girl was raped and murdered, where was God when that happened? Men are killing each other for 5 bucks and other idiotic reasons. The other day one guy shoot the other 5 times because he refused to open the window of the bus. Where was Him? Was that meant to be? If so, why? It's unknown. There are also so many different Gods according to a lot of religions that all can't be true but it's possible that all are wrong. There is no direct evidence of the existance of God. Any evidence gathered until now fails by using circular logic, like people that use the bible to prove the bible itself. Even though, suposing we believe in Him, how could we define God? And if our definition is wrong and the right one got lost over time? Even if we are really opened to accept something we can never be certain. So how can we believe in something that we are not even sure of what it's about?
On the other hand, observing exactly how mysterious life is, we actually figure that is so unlikely that there is nothing out there. How can one give birth, or receive your son on your arms after your wife gave birth and not think life is so miraculous? Look at a non-animated object. It's there, it exists, yet the list stops here. Now look at an animal, a dog for example. It has options, it can go right or left, it can interact with other dogs and other animals, its decisions affect its life, it has feelings and countless other items could be added to this. I don't see how that could not be considered wonderful. Another thing that could make us figure this out is how some strange "coincidences" happen and how some stuff on nature seem oddly precise. Have you ever met a friend you didn't see for ages by accident exactly you really needed someone? Have you ever watched a sunset on the beach? Or smelled the wet grass or earth after rain? Heard a joke on the right time? Got a ride when you were late? All those things seem small and we don't usually pay attention to it. But when we do it makes all the difference, not only on our beliefs but also on our mood. We usually complain about the stuff we lose but do not pay attention to what we gain. Try dedicating 5 minutes every night to analyze what happened on your day. In short-term that could make the difference between being happy or unhappy. In long term it maybe could lead to your answer to the first question I made here.