Garbarge In, Garbage Out

Computers have become such an integral part of our lives. What started out as a piece of machinery that filled a whole room now can fit in someone's pocket!  So many times, people refer to our brains as "computers" and they very well are, but on a much higher level I would presume. After all, we do so many things without even "thinking" of it....we don't ponder about our blood cells exchanging oxygen and waste products, we dont even meditate about how our lungs work......we just go about our business while all these amazing processes go on. As I was reformatting the hard drive on our computer, I was thinking how easy it is to just erase everything......to start from scratch, get rid of every bit of junk that has been bogging down the processes of the computer. And there you have it, a clean slate, ready to go about its "business" like it was fresh from the factory.
What if we could do that with our brains? With a click of a button, we could get rid of all the temp files, all the junk that has been hindering us from operating at full capacity! Being a Christian, I know in "theory", of course I know its fact.......but what I'm trying to say is......I know that is exactly what happens when you are Born Again, in the Spirit, all things become new.....why is it that for most Christians, the garbage is still there? The old habits, the old ways of thinking? The Bible says, be renewed in the Spirit of your mind. I guess if we are falling short of our potential in Christ, it's our own fault. The problem is, there is a delicate balance between resting in God, and working out your own salvation! On one hand, God is the one who is working on us and working through us, on the other hand (I sound like Tevya), we are to draw near to Him, we are to resist the devil, there are things WE have to do. How do you know when you are making progress in God? Do you reach more of a level of contentment and joy? I've been thinking about the fruits of the Spirit....if they are operating, then the roots are planted firmly in the SOIL. I dont know about the rest of the Christian world out there, but lately, I've definitely been wanting to see more fruit in my own life. And out with the garbage!