In the fifteenth century, the Aztec people practiced human sacrifice on an unprecedented scale. They believed that human sacrifices were necessary to fuel the sun, and without such sacrifices the forces of darkness would overpower their sun god, Huizilopochtli.

The Aztecs mostly sacrificed prisoners of war, which led to continuous conflicts with neighboring peoples. Thousands of enemy prisoners might be killed in a single day!

Outside of God's truth, the idea of sacrifice inevitably goes terribly wrong. But inside the Mosaic Law, animal sacrifices showed an awareness of sin and a truly repentant heart before the one true God.

-Today in the Word, p.9