Ecclesiastes 10:12-15

These proverbs deal with the wise and unwise use of the tongue. Generally, wise people speak graciously, but fools destroy themselves by the way they speak. The fool continues to talk even though neither he nor anyone else can tell what the future holds. The picture here seems to be of the fool making dogmatic statements about the future. The fool also does not even perceive what is most obvious. He is so shortsighted that he sees no value in his work (Ecclesiastes 10:15 a). "How to go to a city" is a figure of speech such as "when to come in out of the rain" (Ecclesiastes 10:15 b). The point is that the fool is a jerk.