What does the altar represent in Elijah's story?

In rebuilding the altar of the Lord, Elijah emphasized that worship must be conducted according to God's prescribed methods, separating the true God from false religions. The altar symbolizes the necessity of approaching God through faith and recognizing the ultimate sacrifice, which in Christian understanding is fulfilled in Jesus Christ. This act also indicates the rejection of syncretism, where worship of God is mixed with elements of idolatry, asserting that genuine worship requires undivided devotion to the one true God.