"Here, then, is Jesus's radical redefinition of what is wrong with us. Nearly everyone defines sin as breaking a list of rules. Jesus, though, shows us that a man who has violated virtually nothing on the list of moral misbehaviors can be every bit as spiritually lost as the most profligate, immoral person. Why? Because sin is not just breaking rules, it is putting yourself in the place of God as Savior, Lord and Judge."
- Timothy Keller in his book, The Prodigal God, reflecting on the nature of sin in Jesus's parable of the prodigal sons.