Darash Chai - Seek Life!

Just after reading about the sin sacrifice in Leviticus 4, we then read about the guilt sacrifice. A sacrifice that is in many ways related to the sin sacrifice and yet not. It is its own thing. How are they different? What do they reveal about us as humans? Sin brings guilt... doesn't it? If sin causes a person to be guilty then why two separate sacrifices? Is there perhaps something we are missing from the way that we usually conceptualize the ideas of sin and guilt?