What kind of concepts would be hard to delineate? I like the Zen approach to mystery, which is to accept it and resist the temptation to rationalize the myster

What kind of concepts would be hard to delineate? I like the Zen approach to mystery, which is to accept it and resist the temptation to rationalize the mystery away. Thus no absurd concepts are needed, since concepts are not needed. (I’m relatively new to Zen so I may be off the mark a bit here, but I think I got the essence correct)