Knowledge is useless, if it is not used in any good way. Faith is useless, if you have no knowledge of to what you are faithful.
I have understood sin is to reject God. If one is faithful to God, and doesn't reject Him, he has no sin. Knowledge is required to be faithful. But it does not mean that person must have all the knowledge. And without any knowledge person probably is already in sinful state, but without knowing it.
Knowledge is useless, if it is not used in any good way. Faith is useless, if you have no knowledge of to what you are faithful.
I have understood sin is to reject God. If one is faithful to God, and doesn't reject Him, he has no sin. Knowledge is required to be faithful. But it does not mean that person must have all the knowledge. And without any knowledge person probably is already in sinful state, but without knowing it.