"I know. I know." Tsoknyi Rinpoche calls this phrase the Western mantra. How often we say, "I know." Our conversations are also peppered with unconscious, "You know?"s
Chances are that although you and i "know" something intellectually, it hasn't penetrated our being into "knowing." Robert Heinlein called this thorough knowing "grokking" in his novel Stranger in a Strange Land.
Our Western mantra doesn't transform us. The knowing of the mind is not sufficient. We are still at the beck and call of habit. When the body "knows," then we well and truly DO know.
We think that everyday knowing is sufficient to get us through. When knowing soaks into us, soaks through us, there we will find release.