“On the way from Midian, Moses received a startling and terrible warning of the Lord’s displeasure. An angel appeared to him in a threatening manner, as if he would immediately destroy him. No explanation was given; but Moses remembered that he had disregarded one of God’s requirements. Yielding to the persuasion of his wife, he had neglected to perform the rite of circumcision upon their youngest son. In his mission to Pharaoh, Moses was to be placed in a position of great peril; his life could be preserved only through the protection of holy angels. But while living in neglect of a known duty, he would not be secure… In the time of trouble just before the coming of Christ, the righteous will be preserved through the ministration of heavenly angels; but there will be no security for the transgressor of God’s law. Angels cannot then protect those who are disregarding one of the divine precepts.”
Patriarchs & Prophets p.255-256