Question: Are there consequences for the individual who denies the existence of the Devil?

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Question: Are there consequences for the individual who denies the existence of the Devil?

Response: In warfare, one of the most effective ways to take an opponent by surprise is camouflage. If one doesn’t know of their enemy’s existence, they are clearly not on guard. Peter warns in 1 Peter:5:8Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour:
See All..., “Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour...” (emphasis added).

In 2 Corinthians:2:11Lest Satan should get an advantage of us: for we are not ignorant of his devices.
See All... Paul also warned, “Lest Satan should get an advantage of us: for we are not ignorant of his devices.” The Bible very clearly teaches the existence of Satan. He is the father of lies (Jn:8:44Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.
See All...), the accuser of the brethren (Rv 12:10), and the enemy of man (Gn 3:15), whose head the Lord Jesus was prophesied to crush. “Satan” itself means “adversary.”

Satan’s chosen purpose is to oppose God and His plan while leading as many people as he can into rebellion against their Creator. Satan does have a “limited” authority in this world (Job:1:12And 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.
See All..., 2:6). He is “the god of this world [who] 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” (2 Cor:4:4In 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.
See All...).

The Bible declares that Satan exists, and it describes how he operates. We must not be intimidated by Satan, for his power is wholly inferior to God’s. The Bible, however, teaches us to be informed of the spiritual battle before us (Eph:6:10Finally, my brethren, be strong in the Lord, and in the power of his might.
See All...–18). We are admonished to first submit to God before resisting the devil (Jas 4:7), and we know that our Lord has defeated him forever at the Cross, and Satan’s certain end and eternal judgment are assured (Rv 19:20).

There certainly are consequences for those who refuse to acknowledge his existence. They are basically unsuspecting targets.