You've heard it said, "Well, they may have messed up on this occasion but they're a good person at heart." This would be great if it were true. And sure, there are many people who do good things, even those who find themselves locked up in prison.

However, the truth of the matter is that you sin because you have a sinful nature. You don't just commit sin, lots of sin, but you sin because you are a sinner.

Jesus said, "For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:"