Den of Devils

1 John 5:18-19 NIV - We know that anyone born of God does not continue to sin; the One who was born of God keeps them safe, and the evil one cannot harm them. 19 We know that we are children of God, and that the whole world is under the control of the evil one.

2 Corinthians 11:13-15 NIV - For such people are false apostles, deceitful workers, masquerading as apostles of Christ. 14 And no wonder, for Satan himself masquerades as an angel of light. 15 It is not surprising, then, if his servants also masquerade as servants of righteousness. Their end will be what their actions deserve.
In the context of the secular world and religious world, how do you typically see examples or applications of Satan disguised as “an angel of light”?  How might you best avoid this deception?
John 8:44 NIV - You belong to your father, the devil, and you want to carry out your father’s desires. He was a murderer from the beginning, not holding to the truth, for there is no truth in him. When he lies, he speaks his native language, for he is a liar and the father of lies.
Consider the following ways the devil or demons are described in Scripture:  deceiver, unclean, liar, tempter, accuser, murderer, evil.  Consider also how Scripture teaches that the whole world lies under the sway of Satan.  In what regards might you need to examine yourself or your relationships to guard against these Satanic traits and behaviors?
Satan means adversary.  Devil means slanderer.  Tough questions now, but necessary for a spiritual evaluation and personal growth: Have you ever been an adversary or slanderer of the righteous?  Or perhaps even of Christ’s church and its mission?  Consider from where the temptation to do so originates?  How do you feel when you are opposed by someone when you are trying to do the right thing?  How do you feel when you are slandered, defamed, or falsely accused?  Demonic activity and influence is often so subtle that we tend to disregard it.  Christ defeated demons with Scripture and the exercise of His authority. How might you better use the Scripture to resist the devil? Where might you better submit to God first?  Will you then trust the promise of Scripture that the devil will run away from you?
James 4:7 NIV - Submit yourselves, then, to God. Resist the devil, and he will flee from you.