"Too often, [...] we assume that the person who is the object of our feedback has something to learn and fail to notice the same thing about ourselves."

This is a really important observation. Without checking ourselves, our feedback can be a way to ensure our vision remains myopic, and can enforce a kind of conservatism that (like all conservatism, I believe) ultimately serves nobody.

Feedback is important, but curiosity, care, and respect are even more important. Starting off with an assumption that our colleague might know something we don't - and a need to get to the "why" of everything we notice, and consider what we might not be noticing - is more than healthy. #Business