OT Sacrificial System

Lev 1-10 I'm so grateful to not be part of the OT sacrificial system. How could you possibly keep up w/ all your sins? I think I'd have no animals left. The stress on unintentional sin is a reminder that there is so much sin in our hearts, we don't even begin to recognize the full extent of it. Nor is it acceptable to do the right thing the wrong way. Aaron's sons Nadab and Abihu die for offering unauthorized fire before God. God does not exist for us. We exist for Him. We must know Him, know His way, and follow it. But how very, very grateful I am for grace.