“….in Zen doubt is transformed into the path….
The Zen tradition often speaks of three factors that need to be cultivated along the path: great faith, great doubt, and great courage. Thus faith and doubt are brought together. Clearly, doubt in this context does not refer to the kind of wavering indecision in which we get stuck, preventing any positive movement. It means to keep alive the perplexity at the heart of our life, to acknowledge that fundamentally we do not know what is going on, to question whatever arises within us. The acceptance of such doubt as basic to Buddhist practice qualifies the meaning of faith. Faith is not equivalent to mere belief. Faith is the condition of ultimate confidence that we have the capacity to follow the path of doubt to the end. And courage: courage is the strength needed to be true to ourselves under all conditions, to cast aside the obstacles that are constantly thrown in our way.”
— Stephen Batchelor (“The Faith to Doubt: Glimpses of Buddhist Uncertainty”)