Depart from me, ye evil-doers - Workers of iniquity; bad men. See the notes at Psalms 6:8. This indicates a determined purpose that nothing should deter or allure him from the service of God. A man who wishes to serve God, and lead a religious life, must separate himself from the society, as such, of unprincipled people.
For I will keep the commandments of my God - This is my fixed resolution. It may be remarked here
(1) that bad people will turn away from the society of one who has formed such a resolution, and who carries it out;
(2) the resolution is a necessary one to be formed and executed, if a man will serve God;
(3) the formation and execution of such a purpose, is the best way to get rid of the society of bad people.