Once your body “knows” an action so well, you don’t have to think about it. It just seems to be recalled without much effort. For example, I have done the dance “ Electric Slide “ countless times. I could just let my body remember the steps and be totally concentrating on something else. I don’t know if this is the same principle, but once I really “know” another word in a foreign language, I just think in that language with that word without having my mind translate it. A third example, holding and caring for an infant. It’s all in my memory.