I recently heard a religion professor from an SDA university say that the sin is not in the action, it is in the rebellion. He said that if a person believes that God has commanded something, even if He hasn't, and they act out of line with their belief, they have sinned. Yet, another person who holds no such belief can perform the same act and not sin. He used a donut as an example. If Peter believes that God has forbidden the eating of donuts, yet he goes down to the local cop hang-out and eats a donut, he has placed his will above God's. Maybe eating the donut was not a sin, but in eating the donut he still sinned against God. Now Mary doesn't believe Peter's assertion that donuts are forbidden food, and she also eats one. Has she sinned? Peter asserts that God wants us to be healthy and in eating something unhealthy we are in direct disobedience, thus, in sin. He believes that donuts, although not specifically mentioned in the Bible, are fundamentally wrong. Is it possible that when they go out for a donut, Paul is truly sinning, and Mary is not?