“For you are not a God who delights in wickedness; evil may not dwell with you. The boastful shall not stand before your eyes; you hate all evildoers. You destroy those who speak lies; the Lord abhors the bloodthirsty and deceitful man.” -Psalm 5:4–6
If the first strophe is the invocation, this is the confession. To confess is to “say the same thing,” to agree with God, to agree with reality, or to agree with the truth. David is confessing the attributes of God’s holiness: this is who God is; this is what he is like.
Which is another way of highlighting what we humans are not like.
Confession helps us draw the boundaries of righteousness with straight, clear lines so we might know where we stand with God. Further, confession assists us in orienting our affections toward those thing that ought to be so we can properly align ourselves with God. Or, as the divines would say, it assists us in properly ordering our loves.