Jesus is the Lamb slain from before the foundation of the world. In the seen and temporal, He was the lamb slain 2000 years ago. In the unseen and eternal, He has always been the slain Lamb. In the seen and temporal realm, you and I live physically right now. In the unseen and eternal realm, you and I were crucified on the cross with Christ. Our old man, inherited from Adam, dead to and separated from God, died with Him.