" When there is great doubt,” says a Zen aphorism that Kusan Sunim kept repeating, “then there is great awakening.” This is the key. The depth of any understanding is intimately correlated with the depth of one’s confusion. Great awakening resonates at the same “pitch” as great doubt. So rather than negate such doubt by replacing it with belief, which is the standard religious procedure, Zen encourages you to cultivate that doubt until it “coagulates” into a vivid mass of perplexity. "

― Stephen Batchelor , Confession of a Buddhist Atheist