During the Passover, wherever the Blood of the Lamb had been applied, the people and animals were safe. No death came to those who had prepared the sacrifice of a perfect lamb, and had painted that blood over their doorposts. The death angel had to pass them by. The same still goes today, except that we can use the Blood of Jesus by faith over our families, dwellings, and animals. Only Blood can cover sins, only blood can allow us access to the throne of the Father. Only believing in that Blood left on the Cross that Jesus allowed 2000+ years ago, will keep you impenetrable from the evil attacks of the enemy. It was given freely by our Lord, so use it freely, and rejoice, for it covers all your sins, and will cause the enemy to pass-over you and yours!