Could his [Moses'] eyes have been opened, he would have seen the messengers of God, pure, holy angels, bending lovingly over him, shedding their light around him.—The Signs of the Times, February 19, 1880. TA 90.1
While engaged in his round of duties he [Moses] saw a bush, branches, foliage, and trunk, all burning, yet not consumed. He drew near to view the wonderful sight, when a voice addressed him from out of the flame. It was the voice of God. It was He who, as the angel of the covenant, had revealed Himself to the fathers in ages past. The frame of Moses quivered, he was thrilled with terror as the Lord called him by name. With trembling lips he answered, “Here am I.” He was warned not to approach his Creator with undue familiarity: “Put off thy shoes from off thy feet; for the place whereon thou standest is holy ground.” “And Moses hid his face; for he was afraid to look upon God.”—The Signs of the Times, February 26, 1880. TA 90.2
With his wife and children, Moses set forth on the journey [to Egypt].... 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. He had failed to comply with the condition by which his child could be entitled to the blessings of God's covenant with Israel.... Zipporah, fearing that her husband would be slain, performed the rite herself, and the angel then permitted Moses to pursue his journey. 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; for he could not be shielded by the angels of God.—Patriarchs and Prophets, 255, 256. TA 90.3
Aaron, being instructed by angels, went forth to meet his brother, from whom he had been so long separated; and they met amid the desert solitudes, near Horeb.... Together they journeyed to Egypt; and having reached the land of Goshen, they proceeded to assemble the elders of Israel.—Patriarchs and Prophets, 257. TA 91.1