A phrase I heard recently and found useful: I agree with the idea, but I disagree with the tone.
Many ideas get dismissed because they are delivered in a cocky or hostile or dismissive tone—or because of who delivers them.
Separate substance from style.
“If I have a difficult thing to understand, if there’s something I think is not going to be that easy to get, I try to say it in three different ways. I think if you come in from different angles you have a better chance of getting a three-dimensional view of this difficult idea.”