"One does not divine this by impressions or knowledge." What this means is that no matter how much you try to figure or calculate by means of impressions or knowledge, it will not prove the least bit useful. Therefore, separate yourself from the discrimination of figuring things out.
Source: Takuan Soho in The Unfettered Mind. Trans. W. S. Wilson. Tokyo, 1986., p 62
Contributed by: Zaady