Job 1: 6 – 12: Now there was a day when the sons of God came to present themselves before the LORD, and Satan came also among them. And the LORD said unto Satan, Whence comest thou? Then Satan answered the LORD, and said, From going to and fro in the earth, and from walking up and down in it. And the LORD said unto Satan, Hast thou considered my servant Job, that there is none like him in the earth, a perfect and an upright man, one that feareth God, and escheweth evil? Then Satan answered the LORD, and said, Doth Job fear God for nought? Hast not thou made an hedge about him, and about his house, and about all that he hath on every side? thou hast blessed the work of his hands, and his substance is increased in the land. But put forth thine hand now, and touch all that he hath, and he will curse thee to thy face. And the LORD said unto Satan, Behold, all that he hath is in thy power; only upon himself put not forth thine hand. So Satan went forth from the presence of the LORD.
In Heaven there are the angels that are the servants of God (ministering spirits [Hebrews 1: 13 – 14]), and then there are the angels that are the sons and daughters of God (theophanies [Matthew 18: 10]), so the angels in Job 1 are sons and daughters of God because they came from the loins of their Father and were part of His eternal thoughts. John 8: 35 shows that the servant abideth not in the house for ever (such as Lucifer and the angels that fell), but the son abideth forever.
The sons of God are the theophanies that stand before the presence of God, surrounding the Throne in Heaven (Revelation 5: 11). Job 38: 1 – 7 shows that Job was among the sons of God shouting for joy when the Lamb took the Book and redeemed the names in the Book before the foundation of the world.
When Satan came among the sons of God, he was not accusing Job’s angel (his heavenly representation), but was accusing Job’s flesh body on the earth. Satan is thus an accuser of the brethren in their earthly existence (Revelation 12: 10) because he cannot accuse their angels. The angels of the believer are in their perfection, but the soul that has representation in the angel lives in a body on the earth that is not perfect, and it is that body that Satan is an accuser of (because the flesh body has a law of sin in it [Romans 7: 14 – 25]. Satan is an accuser of the brethren, but when God looks at His sons and daughters on the earth, He sees them perfect and upright because He is looking at them through the blood.