Please do not indulge in unkind words, in negative comments. Criticism, as you know, can only be useful when it is constructive. Comments can only be useful when they are friendly. So even from the point of view of effectiveness, I would suggest that unkind comments add to the problem. Unloving criticism makes the situation worse. It does not mean that we do not have to comment and suggest. Very often we have to. But it is the mental attitude with which you make the suggestion and the loving concern with which you put forward ideas, sometimes opposed to others, that make for effectiveness.

Eknath Easwaran