Holly, I definitely agree with you that we should always engage our brain rather than our emotions when we receive criticism. We can never really know what other people feel when they say certain things to us. Many times, we can take advice as criticism because of how we feel or what we are doing. It may not have anything to do with us personally, but rather be a way that somebody is showing their care and concern.
A lot of times we seem to get stuck and someone will come and try to help us out. Depending on how we feel, we might completely interpret their words as negative. So if we engage our brain and stop to think about the way the person is responding, we might actually be able to gain something positive from the comments. If we just become hurt or angry, then our emotions have interpreted what is being said as criticism, rather than useful help and we gain nothing.
Usually we can tell when a critical person is giving criticism and we should decide if their advice is one that should even be listened to or acknowledged, much less be hurt by it. If someone that you know to be very kind, gives advice that hurts, then it is best to react with our brains and not with our emotions. The criticsm being given by a friend, partner, elder or whatever is probably given as advice and should not be hurtful, if we don't let our emotions take root. As an artist, we had to learn to critique each other and I had to learn that it was "positive" information, to help me, rather than something to hurt me.
We really should not be so fragile as to think that criticism is a personal comment on US or about US, but rather as something to help us. That, of course, exludes the criticism given by someone that we know to be mean spirited, usually harsh or generally very negative.
We must believe in our own value and not let other's criticism negatively affect us.
Trish