"We are courteous to the words of others. We listen and do not contradict. We try to understand; and, when other persons express their opinions, however much they may differ from ours, we keep ourselves from violence in thought and word, and listen with deference where we cannot agree. Then, when we state our own notions with gentleness and modesty, we shall find that they are gently received."
This quote struck me as something I could work on.