Promised Faithfulness to the Lord

A Psalm of David.
  1I will sing of mercy and justice;
   To You, O Lord, I will sing praises.
  2I will behave wisely in a perfect way.
   Oh, when will You come to me?
   I will walk within my house with a perfect heart.
  3I will set nothing wicked before my eyes;
   I hate the work of those who fall away;
   It shall not cling to me.
   4A perverse heart shall depart from me;
   I will not know wickedness.
  5Whoever secretly slanders his neighbor,
   Him I will destroy;
   The one who has a haughty look and a proud heart,
   Him I will not endure.
  6My eyes shall be on the faithful of the land,
   That they may dwell with me;
   He who walks in a perfect way,
   He shall serve me.
   7He who works deceit shall not dwell within my house;
   He who tells lies shall not continue in my presence.
   8Early I will destroy all the wicked of the land,
   That I may cut off all the evildoers from the city of the Lord.