1 Do not boast about tomorrow,
for you do not know what a day may bring forth.
16 restraining her is like restraining the wind
or grasping oil with the hand.

15 A quarrelsome wife is like
      a constant dripping on a rainy day;

17 As iron sharpens iron,
so one man sharpens another.

22 Though you grind a fool in a mortar,
grinding him like grain with a pestle,
you will not remove his folly from him.