Today in Exodus we read the instructions for celebrating the Passover, and the significance of the sacrifice:
“Every first-born of man among your sons you shall redeem…for when Pharaoh stubbornly refused to let us go, the Lord slew all the first-born in the land of Egypt, both the first-born of man and first-born of cattle. Therefore I sacrifice to the Lord all the males that first open the womb; but all the first-born of my sons I redeem.” (Exodus 13)
So the first-born animals are sacrificed as an offering of worship and gratitude to God, and to remember what happened in Egypt; people, on the other hand, are not. The first-born male child was purchased back – or redeemed – by the spilling of animal blood.
This idea of ‘buying back’ one’s child is exactly what happens at the Cross. Except that the purchase price is not a sheep or goat; it is Jesus. He is sacrificed on the Altar that we might live.
May God bless you!