1. The activity of evil spirits is also in God’s sovereignty. (1 Kings 22:20-23)
    Job 1:9-12, Rev 3:9

In the Old Testament, God allowed an evil spirit to pour a lying spirit upon false prophets. (1 Kings 22:20-23)

1 Kings 22:20 And the Lord said, Who shall persuade Ahab, that he may go up and fall at Ramothgilead? And one said on this manner, and another said on that manner.
21 And there came forth a spirit, and stood before the Lord, and said, I will persuade him.
22 And the Lord said unto him, Wherewith? And he said, I will go forth, and I will be a lying spirit in the mouth of all his prophets. And he said, Thou shalt persuade him, and prevail also: go forth, and do so.
23 Now therefore, behold, the Lord hath put a lying spirit in the mouth of all these thy prophets, and the Lord hath spoken evil concerning thee.

In the Old Testament, God allowed Satan to strike all of Job’s possessions. (Job 1:9-12)

Job 1:9 Then Satan answered the Lord, and said, Doth Job fear God for nought?
10 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.
11 But put forth thine hand now, and touch all that he hath, and he will curse thee to thy face.
12 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.

Christ will bring Satan to his knees at our feet. (Rev 3:9)

Rev 3:9 Behold, I will make them of the synagogue of Satan, which say they are Jews, and are not, but do lie; behold, I will make them to come and worship before thy feet, and to know that I have loved thee.