Perhaps he’s saying, “Make sure the information that’s positive for you is credible, and accept the information that’s negative for you.
from The Art of Worldly Wisdom Know how to take a hint.
xxv It used to be an art to be able to banter, but now it is no longer enough. We must know how to take a hint. Especially when it comes to self-discipline. He who does not make himself intelligible cannot make himself intelligible. But on the other hand, there are those who call themselves fortune-tellers of the mind and lynxes of the will. The truths most relevant to us are only half-told, but if we pay attention, we can grasp their full meaning. If you hear something good, manage your credibility well; if you hear something bad, spur it on.
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