The Old Testament promised a blessed and secure life to those who obeyed the law (for example, Leviticus 18:5, quoted in Romans 10:5). However, people inherit a strong tendency to sin because of the effects of Adam's sin. So, when God’s commands come to us, we often resist and disobey them. So, instead of bringing life, the law only reveals our lost and vulnerable spiritual condition. We need God to change our desires because the law cannot provide this inner change.