Satan keeps school for neglected children.

The devil will promise you the whole world, but he doesn't own a grain of sand.

When the devil is called the god of this world, it is not because he made it, but because we serve him with our worldliness.

Is Satan omnipresent? No, but he is very spry. Is he bound? Yes, but with a rather loose rope.

... Get thee behind me, Satan ...

The heart of man is the place the devil dwells in: I feel sometimes a hell within myself.

The devil's most devilish when respectable.

There is a battle going on for the minds of people. We do need to be alert to the devil's schemes and subtle teachings that masquerade as truth in our society. But the way to resist such mental error is not with emotional diatribes. Instead there needs to be a clear understanding of the Bible's teaching about demonic error, accompanied by a committed submission to the commands of scripture.

... even the devil works for God.

Better sit still, than rise to meet the devil.