Read Ecclesiastes 8:15 Using Other Translations
Then I commended mirth, because a man hath no better thing under the sun, than to eat, and to drink, and to be merry: for that shall abide with him of his labour the days of his life, which God giveth him under the sun.
And I commend joy, for man has no good thing under the sun but to eat and drink and be joyful, for this will go with him in his toil through the days of his life that God has given him under the sun.
So I recommend having fun, because there is nothing better for people in this world than to eat, drink, and enjoy life. That way they will experience some happiness along with all the hard work God gives them under the sun.