OK, God. I'm listening.
What's the point? First, we need to neither give them too much, nor too little, thought. Here is a great passage from C.S. Lewis' book The Joyful Christian:
"The commonest question [I am asked about The Screwtape Letters] is whether I really "believe in the Devil".
Now, if by "the Devil" you mean a power opposite to God and, like God, self-existent from all eternity, the answer is No. There is no uncreated being except God. God has no opposite. No being could attain a "perfect badness" opposite to the perfect goodness of God; for when you have every kind of good thing (intelligence, will, memory, energy, and existence itself), there would be none left of him.
The proper question is whether I believe in devils. I do. That is to say, I believe in angels, and I believe that some of these, by the abuse of their free will, have become enemies to God and, as a corollary, to us. These we may call devils. They do not differ in nature from good angels, but their nature is depraved. Devil is the opposite of angel only as Bad Man is the opposite of Good Man. Satan, the leader or dictator or devils, is the opposite, not of God, but of Michael." (Emphasis mine)
I love the reminder that Satan is not the opposite of God, but of Michael, the arch angel. God created both and has full power and authority over both. Satan is just really ticked off about his final end and is taking as many as he can with him- both angel and human.
What is our role in this already won war? To win some battles through the power of Jesus Christ. There is a war going on. Ephesians 6:10-20 gives us a great synopsis of this. However, there is one other seldom used passage I love on this topic.
When the servant of the man of God got up early and went out, he discovered an army with horses and chariots surrounding the city. So he asked Elisha, "Oh, my master, what are we to do?"
Elisha said, "Don't be afraid, for those who are with us outnumber those who are with them."
Then Elisha prayed, "LORD, please open his eyes and let him see." So the LORD opened the servant's eyes. He looked and saw that the mountain was covered with horses and chariots of fire all around Elisha.
2 Kings 6:15-17
There is a constant battle around us, and the way in which Elisha handled is a great example. He knew it was there, he gave it thought and credit, but he did not dwell on it. You didn't hear him always talking about the unseen realm. He focused on doing God's will.
As for Christians being tempted by demons/ the Devil we must remember that Satan- the accuser - is not omnipresent. He can not be everywhere at once like God. Thus most people have to deal with his demons. Honestly though, what difference does it make? Temptation is temptation, and the blood of Christ covers them all no matter who incited it.
As for the "strength" of the temptation, we need only to remember His Word to us in 1 Corinthians 10:13. "No temptation has overtaken you except what is common to humanity. God is faithful and He will not allow you to be tempted beyond what you are able, but with the temptation He will also provide a way of escape, so that you are able to bear it."
He will always prove a way of escape- if we are willing to look to Him for it.
There really is nothing else to this. Yes, it is here. Yes, we need to know about it. And NO, we shouldn't let it consume our thoughts. We should let only Christ and Him crucified have that honor.