Job 2:2, Ezk 22:25, 1 Pt 5:8, Lk 22:31, 2 Cor 2:11, 2 Cor 4:4, Eph 4:27, Eph 6:11, Rev 12:9, Rev 20:10

Satan is roaming the earth to devour the souls of men. (Job 1:7, Job 2:2, Ezekiel 22:25)

Job 1:7 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.

Job 2:2 And the Lord said unto Satan, From whence comest thou? And Satan answered the Lord, and said, From going to and fro in the earth, and from walking up and down in it.

Ezekiel 22:25 There is a conspiracy of her prophets in the midst thereof, like a roaring lion ravening the prey; they have devoured souls; they have taken the treasure and precious things; they have made her many widows in the midst thereof.

Satan is still going around to deceive believers. So we must be sober and watchful. (1 Pet 5:8, Luke 22:31, 2 Cor 2:11, 2 Cor 4:4, Ephesians 4:27, Ephesians 6:11)

1 Pet 5:8 Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour:

Luke 22:31 And the Lord said, Simon, Simon, behold, Satan hath desired to have you, that he may sift you as wheat:

2 Cor 2:11 Lest Satan should get an advantage of us: for we are not ignorant of his devices.

2 Cor 4:4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.

Ephesians 4:27 Neither give place to the devil.

Ephesians 6:11 Put on the whole armour of God, that ye may be able to stand against the wiles of the devil.

Christ destroyed the work of the devil. (1 John 3:8)

1 John 3:8 He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.

Satan will be tormented in hell forever in his last days. (Rev 12:9, Rev 20:10)

Rev 12:9 And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.

Rev 20:10 And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.