Boast not thyself of to-morrow; for thou knowest not what a day may bring forth.

Related:

• A continual dropping in a very rainy day and a contentious woman are alike.
  Old Testament -- Proverbs xxvii,...
• Faithful are the wounds of a friend. -- Old Testament -
  Proverbs xxvii,...
• If thou faint in the day of adversity thy strength is small.
  Old Testament -- Proverbs xxiv,...
• Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.
  Old Testament -- Proverbs xxvii,...
• Open rebuke is better than secret love. -- Old Testament -
  Proverbs xxvii,...
• A wise son maketh a glad father. -- Old Testament -
  Proverbs x,...
• Wine is a mocker, strong drink is raging. -- Old Testament -
  Proverbs xx,...
• O Lord, grant that we may always be right, for Thou knowest we will never change our minds.
  Old Scottish...
• Let not him that girdeth on his harness boast himself as he that putteth it off.
  Old Testament -- 1 Kings xx,...