That adage isn't literally in the Bible, but the following passage may have inspired it: Matthew 12:43-45 - "When an unclean spirit goes out of a man, he goes through dry places, seeking rest, and...
One thought:"An idle mind is the devil's playground" is not found specifically in the Bible. It is an English proverb, originally rendered as "Satan finds some mischief still for idle hands to do"....
If you are doing nothing but over analysing and thinking about certain things all the time it leaves too much time for negative thoughts and hypothetical scenarios to make their way into your mind....
The name Lucifer appears only once in the Bible, in Isaiah 14:12. Apparently Lucifer is the name of Satan before his rebellion and fall. See Revelation 17.
See relevant answers.Although this quote is not in the Bible, there is a similar verse that was applied to the people of Sodom:Ezekiel 16.49. Behold, this was the iniquity of thy sister Sodom, pride,...