For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places. Ephesians 6:12 ESV

If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle. Sun Tzu The Art of War - 500 BC

The Word of God is dossier on the Devil that we can’t afford to overlook. - What he’s up to…

Satan will not outsmart us. For we are familiar with his evil schemes. 2 Corinthians 2:11 NLT

Be sober-minded; be watchful. Your adversary the devil prowls around like a roaring lion, seeking someone to devour. 1 Peter 5:8 ESV

Satan disguises himself as an angel of light. 2 Corinthians 11:14 ESV

Our adversary is equally happy as a buddy or a bully, whichever will keep us from real life in Christ.

The thief comes only to steal and kill and destroy. I came that they may have life and have it abundantly. John 10:10 ESV

A great Sign appeared in Heaven: a Woman dressed all in sunlight, standing on the moon, and crowned with Twelve Stars. She was giving birth to a Child and cried out in the pain of childbirth. And then another Sign alongside the first: a huge and fiery Dragon! It had seven heads and ten horns, a crown on each of the seven heads. With one flick of its tail it knocked a third of the Stars from the sky and dumped them on earth. The Dragon crouched before the Woman in childbirth, poised to eat up the Child when it came. Revelation 12:1-4 MSG

The Woman gave birth to a Son who will shepherd all nations with an iron rod. Her Son was seized and placed safely before God on his Throne. The Woman herself escaped to the desert to a place of safety prepared by God, all comforts provided her for one thousand two hundred and sixty days. War broke out in Heaven. Michael and his Angels fought the Dragon. The Dragon and his Angels fought back, but were no match for Michael. They were cleared out of Heaven, not a sign of them left. The great Dragon, ancient Serpent, the one called Devil and Satan, the one who led the whole earth astray thrown out, and all his Angels thrown out with him, thrown down to earth. Revelation 12:5-9 MSG

Then I heard a strong voice out of Heaven saying, Salvation and power are established! Kingdom of our God, authority of his Messiah! The Accuser of our brothers and sisters thrown out, who accused them day and night before God. They defeated him through the blood of the Lamb and the bold word of their witness. They weren't in love with themselves; they were willing to die for Christ. Revelation 12:10-11 MSG

So rejoice, O Heavens, and all who live there, but doom to earth and sea, For the Devil's come down on you with both feet; he's had a great fall; He's wild and raging with anger; he hasn't much time and he knows it.
Revelation 12:12 MSG

One of the most obvious evidences of the deceiver in our world is a world lost in anger and deception.

The reason the Son of God appeared was to destroy the works of the devil. 1 John 3:8b

When the dragon realized that he had been thrown down to the earth, he pursued the woman who had given birth to the male child. But she was given two wings like those of a great eagle so she could fly to the place prepared for her in the wilderness. There she would be cared for and protected from the dragon for a time, times, and half a time. Then the dragon tried to drown the woman with a flood of water that flowed from his mouth. But the earth helped her by opening its mouth and swallowing the river that gushed out from the mouth of the dragon. And the dragon was angry at the woman and declared war against the rest of her children all who keep God’s commandments and maintain their testimony for Jesus. Then the dragon took his stand on the shore beside the sea. Revelation 12:13-17 NLT

And though this world, with devils filled, Should threaten to undo us, We will not fear, for God hath willed His truth to triumph through us: The Prince of Darkness grim, We tremble not for him; His rage we can endure, For lo! his doom is sure, One little word shall fell him. Martin Luther