Vague = half bet?
其實很多外行人不知道其中的道理。
古人傳下他們的知識不是全部寫在古書上,很多命理學的知識都是一半在書一半口傳,他們這樣做的用意是只有真正可以學這些法門的人得到全部的知識, this is unlike in the modern world we have to record many things in details to pass to next generation. For example, If you teach someone how to do anesthesia, you can write in a book 50% of the methodology and keep the remaining by teaching in person, so you can observe if the person learning is for good or bad intention.
其實很多外行人不知道其中的道理。
古人傳下他們的知識不是全部寫在古書上,很多命理學的知識都是一半在書一半口傳,他們這樣做的用意是只有真正可以學這些法門的人得到全部的知識, this is unlike in the modern world we have to record many things in details to pass to next generation. For example, If you teach someone how to do anesthesia, you can write in a book 50% of the methodology and keep the remaining by teaching in person, so you can observe if the person learning is for good or bad intention.