Adonai took us out of Egypt, not by an angel or by a seraf nor by a messenger: Moses was not considered a 'messenger' but rather a spokesman to Pharaoh. He did not have the power to take the people out of Egypt. Rather the Holy One alone could do this. The Hagga`ah therefore states regarding that an angel did not perform the final plague but rather God, and God alone, smote them. That which is written, "He will not permit a destroyer to enter and smite your homes," (Ex. 12:23) refers to the plague of destruction (and not some destroying angel). It should be explained, 'God will not let the destruction enter your homes.'