When people are insulting you, there is nothing so good for them as not to say a word - just to look at them and think. When you will not fly into a passion people know you are stronger than they are, because you are strong enough to hold in your rage, and they are not, and they say stupid things they wished they hadn't said afterward. There's nothing so strong as rage, except what makes you hold it in - that's stronger. It's a good thing not to answer your enemies.