-- The Enlightened Man --

Zen Master Shôgen asked: “Why does the enlightened man not stand on his feet and explain himself?” And he also said: “It is not necessary for speech to come from the tongue.”

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No word can encompass that which is experienced in deep meditation. So Zen doesn't give you a clear cut theory to you to have faith upon. Zen is utterly against all the faith systems because all the faith systems are collection of words. So, Zen is against Hinduism, against Islam, against Christianity. Zen is against all the religions. Zen is both : A religion and a rebellion against all the religion.
People stick to some particular words and think that they have known. Then they fall prey to what psychology terms as 'Confirmation Bias'. They seek all sorts of proof which can confirm that their faith is correct and disregard all those points which goes against their faith system. Someone is an atheist. He will find all kinds of logic which can prove that there is no God. He will disregard all kinds of things which can lead him to God. Someone is a theist. He will ignore all points which can prove that there is no God.
Did you notice - Not a single scientist and philosopher till date have thought that why everything should be logical? Why there should be logic behind everything? You can consult any advanced book of 'Logic Design'. It cannot be proved that there should be logic behind everything. But these so called scientists keep on playing the game of logic. This science doesn't seem to be scientific.
No! Zen doesn't suggest you to become a theist or an atheist. Zen is the purest form of science because it doesn't give you any assumption. Science is based upon assumptions, Zen is not!
Zen has only one message : Meditate!