In the social realm, critical feedback serves the same function as pain in the biological realm. Just as pain comes in a wide range of degrees of severity, so does criticism. Some pain you can safely ignore; other pain can alert you to a life-threatening condition that requires immediate attention. (As many of us experience critical feedback as painful, this analogy is not such a stretch.)
In the social context, the important point I'm trying to make is that everyone needs honest reflections about how they're coming across to others. While you get to exercise discernment about what meaning to give that information, you can't work with what you don't have, and it is never in your best interest to put up barriers to receiving it… even though we do it all the time.
What do I mean? There are all manner of dodges and deflections we clever humans develop to keep feedback at bay, or to discourage observers from making the attempt:
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