Ecclesiastes 10:12 says, The words of a wise man’s mouth are gracious; but the lips of a fool will swallow up himself.  I have heard people say that if you have nothing good to say about a person, then say nothing at all.  We seem to live in a society that takes the opposite view.  Many people delight in television shows that do nothing but speak badly about people.  Solomon tells us that a wise man's words are gracious.  We need to look for something good to say about people, or just say nothing at all.  Many times, the actions people take are done just to create talk.  When we begin to respond foolishly to those actions, and I believe condemning the person instead of the act is one way to do that, then we do ourselves as much harm as we do them.  Verse thirteen says, The beginning of the words of his mouth is foolishness: and the end of his talk is mischievous madness.  We must remember that in this verse Solomon is still referring to the words of the fool.  His words begin in foolishness and end with madness.  Some people speak foolishly, and when others don't believe them, they act maliciously.  We can see that with many groups today.  They spout hatred for other people and then, when words have no effect, they begin to try to harm those who don't listen to them.  This applies to individuals as well as to groups.  The more they are ignored, the more malicious they tend to become.  Then, verse fourteen says,  A fool also is full of words: a man cannot tell what shall be; and what shall be after him, who can tell him?  I believe Solomon is saying, among other things, that the fool is full of words about the future, which no one can know.  When we hear someone forecasting our future, remember the source.  God tells us we cannot know the future, other than in a broad overview, and we do not need to look to someone who claims to know what our future holds.  Verse fifteen says, The labour of the foolish wearieth every one of them, because he knoweth not how to go to the city.  The labor of the foolish making them weary is simple to understand.  They work simply for the things of this world without acknowledging God's plan for their lives, and they are never satisfied.  Matthew Henry says that not going to the city refers to an inability to follow even the most obvious path to meeting their needs.  When we will not turn to God for direction, even if His path for us is obvious, we will miss it.