Fundamentalist Christians how can you worship something that is incomprehensible?

whenever i ask a question like why would god do this or that? the answer is always "its gods plan and his plan is beyond our comprehension" or if a fundie cant answer a question about the conflicting nature of the Abrahamic god it is because "he is beyond our comprehension" or "too great for our minds to understand" so how do you worship and claim to speak for something you cant understand and yet at the same time claim to understand everything about it... it seems as if you carry a double edged sword...