Jesus teaches about the Kingdom of God through a parable about the laborers. This parable reveals a lot about God's perspective of grace, perhaps the controlling theme of the Bible. Problems often arise when we do not deeply understand God's grace. When Christians deeply understand and live under grace, we understand our lack of worthiness before God, and yet are incredibly grateful that Jesus paid the way for us to have a new standing before Him. Under grace, we are freed up to love and serve others because of the security that comes from being under grace. Grace was revealed through Jesus paying for human sin on the cross so we could have access to this incredibly undeserved relationship with God.