If we open our mouth, we should do it wisely. If the answer is faulty, at least the tone can be soft.Of course, some questions do not deserve an answer.<P> Just as every mathamatical sum has a right answer whether the mathamatcian knows it or not, so every human problem has a correct answer whether we give it or not. We may not always give it: for if we have all the answers, we have not heard all the questions. But we should try. And as we succeed, more questions will come---along with honor, success, and joy for us and the world.