A common practice in Scripture is to employ the Decalogue as core teaching upon which more teaching is built. Such is the case in Leviticus. Hebrews employs the New Covenant or Paschal Mystery as its core. Upon that the rest of the book is written. The whole of Scripture then becomes the measure against which I examine my personal behavior.
Personal responsibility is a major theme of the prophets.
I am responsible for my own sin. God grants grace. I am unable to control the decisions of our nation, which lies in the hands of a few people. I become aware of the desires of the flesh - hatreds, rivalry, jealousy, outbursts of fury, selfishness, dissensions, factions and envy. If my behavior includes even an occasional unintentional sin of the tongue, I am still personally responsible for that act and its impact upon the world.