1 Corinthians 16:13
Be on the alert, stand firm in the faith, act like men, be strong.

Ephesians 5:16
Redeeming the time, because the days are evil.

Revelation 12:9
And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceives the whole world: he was cast out into the earth, and his angels were cast out with him.