Today's words of wisdom come from the master swordsman Yagyuu Munenori (1571-1646), a contemporary of Miyamoto Musashi. This passage mirrors the idea of "mushin" (no mind) and "Being the Squirrel". It also predates the idea of declarative vs. procedural knowledge by about 300 years...
From "The Book Of Family Traditions On The Art Of War":
In all things, uncertainty exists because of not knowing. Things stick in your mind because of being in doubt. When the principle is clarified, nothing else sticks in your mind. This is called consummating knowledge and perfecting things. Since there is no longer anything sticking in your mind, all your tasks become easy to do.
For this reason, the practice of all arts is for the purpose of clearing away what is on your mind. In the beginning, you do not know anything, so paradoxically you do not have any questions on your mind and you are obstructed by that. This makes everything difficult to do.
When what you have studied leaves your mind entirely, and practice also disappears, then, when you perform whatever art you are engaged in, you accomplish the techniques easily without being inhibited by concern over what you have learned, and yet without deviating from what you have learned. This is spontaneously conforming to learning without being consciously aware of doing so.
...When you have built up achievement in cultivation of learning and practice, even as your hands, feet, and body act, this does not hang on your mind. You are detached from your learning yet do not deviate from your learning. Whatever you do, your action is free.