Four days. That is how long the Israelite families were to take in the lamb they had chosen for the Passover. Why four days? Why not choose the lamb right before the Passover? One reason seems to be that this gave time for the families to observe the lamb and notice any defects that would disqualify it from being a worthy sacrifice. But there is another potential reason: attachment.
God may have wanted the families to get to know this lamb. Perhaps even love it. Because in doing so, they would appreciate the sacrifice of this lamb all the more. Saving the life of the firstborn came at a cost, and it wasn’t paid by a lamb pulled randomly from the flock—it was by a lamb they had come to know. If this was part of God’s intent, then this adds yet another layer of complexity and beauty to the gospel picture painted by the Passover, illustrating that our salvation did not come from a random person but was provided by the spotless Lamb of God whom we know and love.
How does your love for Christ deepen your appreciation of the cross?