delight in the law

Oh, the joys of those who do not
      follow the advice of the wicked,
      or stand around with sinners,
      or join in with mockers.
But they delight in the law of the Lord,
      meditating on it day and night.

They are like trees planted along the riverbank,
      bearing fruit each season.
   Their leaves never wither,
      and they prosper in all they do.

                                        -Psalm 1:1-3 NLT