This is a psalm of instruction concerning good and evil, setting before us life and death, the blessing and the curse, that we may take the right way which leads to happiness and avoid that which will certainly end in our misery and ruin. The different character and condition of godly people and wicked people, those that serve God and those that serve him not, is here plainly stated in a few words; so that every man, if he will be faithful to himself, may here see his own face and then read his own doom.