"So shall they fear the name of the LORD from the west, and his glory from the rising of the sun. When the enemy shall come in like a flood, the Spirit of the LORD shall lift up a standard against him." (Isaiah 59:19)
The great enemy of our souls "the devil, as a roaring lion, walketh about, seeking whom he may devour" (1 Peter 5:8). Yet he can also be "transformed into an angel of light," and so can "his ministers also be transformed as the ministers of righteousness" (2 Corinthians 11:14-15). He and his ministers are perhaps most dangerous when most deceptive, quoting Scripture and spiritual sentiments in a superficial show of piety, yet distorting the "Scriptures, unto their own destruction" (2 Peter 3:16), and we must use the sword of the Spirit against them.
Then there are those times when, angered that their deceptions (sometimes even their own self-deceptions) are not persuading the true people of God to compromise their stand for God's truth and His great salvation, they resort to great pressure and overt opposition—even persecution—seeking to silence their testimony. The enemy comes in like a great flood, and the waves seem about to engulf us, and we cry with the psalmist: "If it had not been the LORD who was on our side, when men rose up against us: Then they had swallowed us up quick, when their wrath was kindled against us: Then the waters had overwhelmed us, the stream had gone over our soul" (Psalm 124:2-4).
But God is on our side, as long as we are on His side and hold fast to His clearly revealed Word. Before the demonic flood can overwhelm us, the Spirit of the Lord will lift up His standard (or, more literally, "put him to flight"), and God will prevail once again, for "the foundation of God standeth sure" (2 Timothy 2:19), and "greater is he that is in you, than he that is in the world" (1 John 4:4). HMM