Take a can of soda.
Imagine trying to remove all the bad from it to make it good. Impossible, right? Yes! After a while, removing all the bad has only left you with an empty soda can.
Now, relate that to your spiritual life.
Imagine yourself, day after day, trying to remove all the bad in an attempt to make yourself good. Have you tried it? Does it work? Well, if we are honest, the answer is no. As honorable an effort as that might be, it is not productive and leaves us defeated. We could potentially spend every waking moment trying to rid ourselves of all the bad we find in our lives. At some point we have to begin to fill our lives with good to replace the bad, not simply remove all of the bad.
God has given us so many good things to fill our lives with that we can begin the transformation with any number of them. Seek first the kingdom...see what He has waiting for you. Fill your life with things that are excellent, praiseworthy, noble, and edifying. See how quickly transformation takes place and the junk of our sinful nature subsides. When we spend time pouring good into our lives, we can't help but be changed.