The Bible is a blood covenant; blood was offered for mankind to bring him into fellowship with God. Whenever the blood was shed it made way for the power and glory and fire of God to fall. Every animal that died was pointing toward the blood of Jesus shed from the foundation of the earth. We can trace the blood and resulting fire throughout scripture and find a place where we identify with that blood and receive for ourselves the fire of his presence. If we want fire in our hearts, we know how to find it. There is fire in the blood.