The labour of the foolish wearieth everyone of them,.... The labour of fools, both in speaking and doing, weary those who have any concern with them, and themselves likewise, since all their labour is vain and fruitless;because he knoweth not how to go to the city; to any city, the road to which is usually broad, and plain and easy to be found, and yet cannot be found by the foolish man; showing, that he that talks of abstruse things, things too high and wonderful for him, which he affects to know, must needs be a stranger to them, since things the most easy to be understood he is ignorant of, and wearies himself to find; or he does not know how to behave himself in a city, among citizens, in a civil and polite manner.
The Targum is,"he learns not to go to the city, where wise men dwell, to learn instruction from it.''Some interpret it of the city of Jerusalem, where were the temple, sanhedrim, synagogues, schools, &c.