Why is the truth? The human believe that know a lot, but everything is to be discovered. 70% of our universe is composed by a thing named "dark energy", but anyone know what is it. Another 25% is composed by "dark matter", and although astronomers know more about it, it's still a big mystery. The last 5% is "know matter", which can interacting with electromagnetic field. What there outside?. Maybe, we can never answer that question. I believe that there are a moral behind it: Nobody know nothing at all. I wonder me why some people believe that have the reason about all the topics, why some people believe that have absolute true?. If the universe is unknown by us, why people kill others in the name of truth?. For my, this behavior is incomprehensible because anyone know the truth and always its judgments will be biased by its own perception.