From Charles H. Spurgeon’s Morning and Evening: Daily Readings, Evening: October 15th:
“But the firstling of an ass thou shalt redeem with a lamb: and if thou redeem him not, then shalt thou break his neck.” Exodus 34:20
Every firstborn creature must be the Lord’s, but since the ass was unclean, it could not be presented in sacrifice. What then? Should it be allowed to go free from the universal law? By no means. God admits of no exceptions. The ass is his due, but he will not accept it; he will not abate the claim, but yet he cannot be pleased with the victim. No way of escape remained but redemption—the creature must be saved by the substitution of a lamb in its place; or if not redeemed, it must die. My soul, here is a lesson for thee. That unclean animal is thyself; thou art justly the property of the Lord who made thee and preserves thee, but thou art so sinful that God will not, cannot, accept thee; and it has come to this, the Lamb of God must stand in thy stead, or thou must die eternally. Let all the world know of thy gratitude to that spotless Lamb who has already bled for thee, and so redeemed thee from the fatal curse of the law.
We’re the asses. Jesus is the Lamb. That’s the Gospel!