Few of us take the time to consider the feelings of other people. We like to get our own way, finding fault and issuing threats or even criticizing in front of others, all without considering the hurt to the other person's pride.
A few minutes thought, a considerate word, or a genuine understanding of the other person's attitude goes so far toward alleviating the sting. Even if we are right and the other person is definitely wrong, we only destroy ego by causing someone to lose face. For the most part, a person already knows if he/she made a grave error or are being unproductive, etc. Is he/she really going to want to correct the situation after being yelled at, criticized, or threatened?
Take the time to consider the other person's feelings, let them save face.
-Dale Carnegie's writings