(This post idea came from PuzzleSolver's post called,"FOCUS if you want to be HAPPY! Oh look, Squirrel!" and the part that had made me to think even more was about the Henry Ford quote that was focused about 'having an idle mind.')
"What is the Mind
The Greek word for mind is "nous." According to Vine's , the mind is where we store information and make decisions. The dictionary definition tells us that the mind is the seat of consciousness, thought, volition or feeling. Proverbs 23:7 says, "as a man thinks, so is he." We become what our mind focuses on. In 2 Peter 1:13, Peter refers to the "loins of the mind," Loins are the part of the human body that contain the reproductive system. Our mind is a creative organ that can imagine and create our present reality. This is why it is so critical that we control what we allow in our minds. In this same verse, Peter goes on to exhort us to "gird up the loins of your mind," meaning to tighten the reign or control what we allow in our minds. Another version says, "so think clearly and exercise self control." If our thoughts can reproduce, then we need to be thinking God's thoughts!" (taken from: http://www.spiritalive.org/newsletter.php?view=12)
Personally, I agree with this statement because after having deleved off into some of the ideologies of LOA (or the Law of Attraction) this statement of "as a man thinketh, so is he" is so true. In LOA, a person can be able to attract what he/she desires because he or she focuses and concentrates on what it is they are trying to manifest in their lives. Imagination also is evidently a very needed resource to guide a person in LOA entirely, because they need to be able to visualize and center themselves in ways to stop worrying about the many "how's" in which things cna be able to come about for them. Simply speaking, if one is not focusing/visualizing in their imaginations about positive energy then it can almost be seen that negative energy will creep in. If one is not applying themselves for the service of others, or to bring in positive energy in their dealings with other people then it can be seen as the idle mind (which is not being kept busy) can lead into the deep end and end up getting itself stirred into trouble.