Ecclesiastes 10:1-3

Contemporary English Version

10 A few dead flies in perfume
    make all of it stink,
and a little foolishness
    outweighs a lot of wisdom.
² Sensible thoughts lead you
    to do right;
foolish thoughts lead you
    to do wrong.
³ Fools show their stupidity
    by the way they live;
it's easy to see
    they have no sense.