Now the serpent was more subtle than any other wild creature that the LORD God had made. Gen 3:1a
Satan, apparently, is a clever fellow. Do you suppose sometimes he tricks us into doing his will?
2 Cor 4:4 in whose case
the god of this world has blinded the minds of the unbelieving so that they might not see the light of the gospel of the glory of Christ, who is the image of God.
Eph 2
And you were dead in your trespasses and sins, 2
in which you formerly walked according to the course of this world, according to the prince of the power of the air, of the spirit that is now working in the sons of disobedience. 3 Among them we too all formerly lived in the lusts of our flesh, indulging the desires of the flesh and of the mind, and were by nature children of wrath, even as the rest.
Eph 6
10 Finally, be strong in the Lord and in the strength of His might. 11 Put on the full armor of God, so that you will be able to
stand firm against the schemes of the devil. 12 For our struggle is not against flesh and blood, but
against the rulers, against the powers, against the world forces of this darkness, against the spiritual forces of wickedness in the heavenly places. 13 Therefore, take up the full armor of God, so that you will be able to resist in the evil day, and having done everything, to stand firm. 14 Stand firm therefore, having girded your loins with truth, and having put on the breastplate of righteousness, 15 and having shod your feet with the preparation of the gospel of peace; 16 in addition to all, taking up the shield of faith with which
you will be able to extinguish all the flaming arrows of the evil one. 17 And take the helmet of salvation, and the sword of the Spirit, which is the word of God.
1 Peter 5:8 8 Be of sober
spirit, be on the alert.
Your adversary, the devil, prowls around like a roaring lion, seeking someone to devour.
Job 1
6 Now there was a day when the sons of God came to present themselves before the Lord,
and Satan also came among them. 7 The Lord said to Satan, “
From where do you come?” Then Satan answered the Lord and said, “From roaming about on the earth and walking around on it.” 8 The Lord said to Satan, “Have you considered My servant Job? For there is no one like him on the earth, a blameless and upright man, fearing God and turning away from evil.” 9 Then Satan answered the Lord, “Does Job fear God for nothing? 10 Have You not made a hedge about him and his house and all that he has, on every side? You have blessed the work of his hands, and his possessions have increased in the land. 11 But put forth Your hand now and touch all that he has; he will surely curse You to Your face.” 12 Then the Lord said to Satan, “Behold, all that he has is in your power, only do not put forth your hand on him.” So Satan departed from the presence of the Lord.
Luke 4
Jesus, full of the Holy Spirit, returned from the Jordan and was led around by the Spirit in the wilderness 2
for forty days, being tempted by the devil. And He ate nothing during those days, and when they had ended, He became hungry.
3
And the devil said to Him, “If You are the Son of God, tell this stone to become bread.” 4 And Jesus answered him, “It is written, ‘Man shall not live on bread alone.’”
5 And he led Him up and showed Him all the kingdoms of the world in a moment of time. 6 And the devil said to Him,
“I will give You all this domain and its glory; for it has been handed over to me, and I give it to whomever I wish. 7 Therefore if You worship before me, it shall all be Yours.” 8 Jesus answered him, “It is written, ‘You shall worship the Lord your God and serve Him only.’”
Matt 4
8 Again,
the devil *took Him to a very high mountain and *showed Him all the kingdoms of the world and their glory; 9 and he said to Him, “All these things I will give You, if You fall down and worship me.” 10 Then Jesus *said to him, “
Go, Satan! For it is written, ‘You shall worship the Lord your God, and serve Him only.’” 11
Then the devil *left Him; and behold, angels came and
began to minister to Him.
"the devil" is what he is. A fallen angel.
"Satan" is his name after having fallen from being Lucifer -- a change of names.