Because the smarter you are, the more you're aware of how little you really know. One of life's most important lessons is to take a moment before you speak, because what is very true for a lot of people is that the smarter you get the less you speak.
shiroiichigo: I don’t know why, but I really started crying after I read this. It’s so true nowadays. Some people only care about money, losing sight of what’s truly important. True wealth is love and happiness and it just can’t be bought with money.