The Psalmist is distinguishing between his private and public life, and how he approaches each. In this Psalm, he is describing how he learns by speaking the axioms, or truths. He recognises that we are not just in a world filled with danger, but because we have a shallow view of sin and the destruction of evil, we must pronounce God's words in response to the dangers we face. The Psalms are written pronouncements from God's view, which is why the words may be extreme and offensive to us.We need to think carefully about this. We teach that people are not just sinners because they do sinful things, but because they are born unable to see their own sinfulness. The reason we don't think this is dangerous is because we are given an awareness of our own sin, so we assume that other people have the ability to understand their condition. We judge others based on our own experience. We assume that our experience is like theirs. But we are our own worst enemy because we trust too much in this world.Therefore, God needs to bridge the gap between His view of the world and our view by making us aware of the dangers in these extreme curses. The blamelessness the Psalmist is describing is the delight he experiences as he becomes comfortable in speaking the extreme axioms. God made His terrible vengeance clear in the pronouncements attractive to us because He made us like Himself. God wants us to think in these extremes so that we experience His presence.