The GREAT CONTROVERSY is the THEME of the SDA Church:

The GREAT CONTROVERSY is the THEME of the SDA Church: 

[The War Between Good & Evil]

And there was war in heaven: 

Michael and His angels fought against the dragon; 

and the dragon fought and his angels,...And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: 

he was cast out into the earth, 

and his angels were cast out with him.

In this GREAT CONTROVERSY between God and His opponent, played out here on this Space Fabric of Time,

in the battlefield of the Hearts & Minds of Mankind,
between the Pillars of the Twin Decrees from the Throne of God, of "Let There Be Light" (Gen. 1:3) to "It is Done" (Rev. 16:17)-- 
The Apostle Paul gives us a WARNING:

For we wrestle not against flesh and blood,

but against principalities, against powers,

against the rulers of the darkness of this world,

against spiritual wickedness in high places.

The Apostle Peter gives us a WARNING:

Be sober, be vigilant; 

because your adversary the devil, 

as a roaring lion, walketh about, 

seeking whom he may devour:

Revelation 12:6,9/Ephesians 6:12/1 Peter 5:8