1 Timothy 5:15

Some [widows] have already turned away [from the faith] to follow Satan.

Matthew 4:10

Then Jesus said to him, “Go away, Satan! For it is written and forever remains written, ‘You shall worship the Lord your God, and serve Him only.’”

Philippians 3:18-19

For there are many, of whom I have often told you, and now tell you even with tears, who live as enemies of the cross of Christ [rejecting and opposing His way of salvation],

1 Timothy 1:20

Among these are Hymenaeus and Alexander, whom I have handed over to Satan, so that they will be disciplined and taught not to blaspheme.

2 Timothy 1:15

You are aware of the fact that all who are in [the province of] Asia turned away and deserted me, Phygelus and Hermogenes among them.

2 Timothy 2:18

who have deviated from the truth. They claim that the resurrection has already taken place, and they undermine the faith of some.

2 Timothy 4:10

for Demas, having loved [the pleasures of] this present world, has deserted me and gone to Thessalonica; Crescens has gone to Galatia, Titus to Dalmatia.

2 Peter 2:2

Many will follow their shameful ways, and because of them the way of truth will be maligned.

For if, after they have escaped the pollutions of the world by [personal] knowledge of our Lord and Savior Jesus Christ, they are again entangled in them and are overcome, their last condition has become worse for them than the first.

2 Peter 3:16

speaking about these things as he does in all of his letters. In which there are some things that are difficult to understand, which the untaught and unstable [who have fallen into error] twist and misinterpret, just as they do the rest of the Scriptures, to their own destruction.

1 John 2:19

They went out from us [seeming at first to be Christians], but they were not really of us [because they were not truly born again and spiritually transformed]; for if they had been of us, they would have remained with us; but they went out [teaching false doctrine], so that it would be clearly shown that none of them are of us.

Jude 1:4-5

For certain people have crept in unnoticed [just as if they were sneaking in by a side door]. They are ungodly persons whose condemnation was predicted long ago, for they distort the grace of our God into decadence and immoral freedom [viewing it as an opportunity to do whatever they want], and deny and disown our only Master and Lord, Jesus Christ.

Revelation 12:9

And the great dragon was thrown down, the age-old serpent who is called the devil and Satan, he who continually deceives and seduces the entire inhabited world; he was thrown down to the earth, and his angels were thrown down with him.

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