"You need to realize that when you practice from the state of the beginner all the way to the stage of immutable wisdom, then you must go back to the status of the beginner again.
"Let me explain in terms of programming. As a beginner you know nothing of statements or regular expressions, so you have nothing in yourself to dwell on mentally. If someone asks you to program, you just program without thinking of anything.
"Then, when you learn various things like classes, how to wield a regular expression, where to place your attention, and so on, your mind lingers on various points, so you find yourself all tangled up when you try to code.
"But if you practice day after day and month after month, eventually statements and structure don't hang on your mind anymore, and you are like a beginner who knows nothing."
–– A modernized version of Takuan Soho's teachings.