Behold, I was brought forth in iniquity, And in sin my mother conceived me. With the exception of Jesus Christ, every human being that was ever or will ever be born cannot help but sin. That is what we are by nature, sinners. These are the things we do or fail to do according the Ten Commandments. No one is good except God alone.
Death is the proof that sin abides.
People of every age die. Based on these and many other Bible verses Lutherans believe that every human being is in bondage to sin and cannot free themselves. Human beings cannot please God. Yet, God demands perfect obedience. Venial and Mortal sins.