definition of sin

I've been listening to Ravi Zacharias (Web Site | RSS Feed) lately. I'm really enjoying his insights and teachings.

On his "Just Thinking" podcast for November 21 (I must have listened to it 6 times already) he talks about John Wesley and how John Wesley's mother had defined sin to him when he was young in this way:

Whatever weakens your reasoning, impares the tenderness of your conscious, obscures your sense of God
or takes away your relish for spiritual things. In short if anything increases the authority and the power of the flesh over the spirit, that to you becomes sin, however good it is in itself.

Wow. Memorize that and put it into practice and see how much it changes your daily living! I know it would change mine!