If our sciences and technology is soooo high, I wouldn't need to clean your computer viruses.. And we should already have colonies in Moon or Mars..

Science is a necessity but not everything.. Our science still not able to replicate human emotions onto robots let alone to prove the existence or non-existence of God.. We're still not able to travel further than moon, let alone to look where is Nirvana or Heaven.. We can only speculate what's inside our earth's core through thermal detectors.. Human can speculate anything about God referring to their Holy Books..

Its you to choose whether to be a believer or not.. For centuries, people die for their beliefs, and things will go the same until the end..