You see, you don’t have peace with God, fellowship with the Creator, based upon your ability to be without ‘leaven’ – sinless. Rather, the sacrifice was acceptable to God, inclusive of the leaven because of the perfect or spotless animal sacrifice. None of us establishes peace with God on any other basis. You can’t qualify yourself, purge yourself, make yourself holy enough to obtain that peace. You can’t do enough good works to somehow grasp it. That’s the fundamental doctrine of grace, isn’t it?