The enemy

1 Peter 5:8

Be sober, be vigilant; because your adversary

 the devil, as a roaring lion, walketh about, 

seeking whom he may devour: 

The devil, is he real?

Yes.

Our adversary.

He tempted Christ in the wilderness.

And sets traps for us today.

BUT JESUS

1 John 3:8... For this purpose the Son of God was manifested,

 that he might destroy the works of the devil.

Be wise

James 4:7
Submit yourselves therefore to God. 

Resist the devil, and he will flee from you.

And 

Revelation 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.