One day, though, I saw something in the Passover story. When the children of Israel were in captivity under Pharaoh, what country were they in? Egypt. After they put the blood on the doorposts of their houses, and the Lord passed over, and their firstborn son was spared, what country were they still in? Egypt.
I saw that as long as our revelation knowledge is limited to the blood side of the cross--Christ dying for us--we may still have our firstborn. That is, our sins are forgiven. But experientially we continue living in captivity. We are still living as if we are subject to the capriciousness of the Pharaohs in our life, in bondage. We are still carnal Christians, striving to overcome by our own effort, trying to become spiritual. It's great to have our sins forgiven. But after a while living as if we are still captives take the glamour off being forgiven.
God had a solution to the problem of the Hebrews' captivity. The solution was to provide them with sustenance, or life, to get them out of Egypt. So he instructed each household, after they had smeared the blood of the lamb on the doorposts, to roast the lamb and eat it as nourishment for the upcoming journey. That's the body side of the cross. You take the lamb (Christ) into you as life.
God is showing us here that the lamb they used for blood on the doorpost was the same lamb they ate for the journey. In other words, everything that is necessary for living the life comes from the lamb. It isn't that the lamb dies for you and then you're sent out to do the rest on your own (with His help, of course). The lamb is the total answer. The lamb that gave its blood for them also gave its life to them. They took its meat into them, and that became their nourishment, strength, and vitality for the journey. They lived their life out of the lamb's life. They walked in its energy. They killed one lamb for two purposes: for the Passover and for the walk.
So Paul took his stand in the open space at the Areopagus and laid it out for them: "I'm here to introduce you to this God.... He doesn't play hide-and-seek with us. He's not remote; he's near. We live and move in him, can't get away from him!" ~Acts 17