Ecclesiastes

Who let this into the Bible? It's a sound and sensible set of moral principles, suggesting that as we have only one life and we should make the most of it;

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. (8:15)

There's also chapter 3, the glorious poem that celebrates "A time to be born and a time to die" and so on. Rock on!