Galatians 3:5  
He therefore that ministereth to you the Spirit, and worketh miracles among you, doeth he it by the works of the law, or by the hearing of faith?

Galatians 2:16  
Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.

Galatians 1:4

Who gave himself for our sins, that he might deliver us from this present evil world, according to the will of God and our Father:

2 Corinthians 13:7

Now I pray to God that ye do no evil; not that we should appear approved, but that ye should do that which is honest, though we be as reprobates.

Acts 26:18

To open their eyes, and to turn them from darkness to light, and from the power of Satan unto God, that they may receive forgiveness of sins, and inheritance among them which are sanctified by faith that is in me.

Matthew 16:23

But he turned, and said unto Peter, Get thee behind me, Satan: thou art an offence unto me: for thou savourest not the things that be of God, but those that be of men.

Mark 4:15

And these are they by the way side, where the word is sown; but when they have heard, Satan cometh immediately, and taketh away the word that was sown in their hearts.

Luke 13:16

And ought not this woman, being a daughter of Abraham, whom Satan hath bound, lo, these eighteen years, be loosed from this bond on the sabbath day?

1 Peter 5:8

Be sober, be vigilant; 

because your adversary the devil, 

as a roaring lion, walketh about, 

seeking whom he may devour: 

James 1:22

But be ye doers of the word, 

and not hearers only, 

deceiving your own selves.

Revelation 21:4

Keep eyes on promises

Isaiah 46:4

With God all things are possible

The disciples described demon activity.

        Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils 1 Timothy 4:1.

                For they are the spirits of devils, working miracles, which go forth unto the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty Revelation 16:14. 

The disciples described the nature of demons.

        Luke 4:33 And in the synagogue there was a man, which had a spirit of an unclean devil, and cried out with a loud voice, 

                Luke 6:18  And they that were vexed with unclean spirits: and they were healed.