This quote on determination really jumped out to me.
When you want a thing deeply, earnestly and intensely, this feeling of desire reinforces your will and arouses in you the determination to work for the desired object. When you have a distinct purpose in view, your work becomes of absorbing interest. You bend your best powers to it; you give it concentrated attention; you think of little else than the realization of this purpose; your will is stimulated into unusual activity, and as a consequence you do your work with an increasing sense of power.

Over the years that I have done ministry, I have seen the application of this quote. When you this quote to change, several key points jump out.

1. If you want to see change, you must deeply, earnestly, and intensely want the change.
2. When you have the above feelings, you will have the determination and will to see the change take place.
3. With the intense desire and determination to see change, you will have the faith to believe it will happen.
4. Unusual activity-you will do things you have never done to accomplish change.

So, why do people not change? Because the reality is that they do not deeply, earnestly, and intensely want to change. They may say they do, but if they are going to be honest they need to analyze how desirous they are to achieve the desired goals. Always finding excuses why change can't occur reveals that the excuses are more important than the goals.

Too many people do things the same way over and over again and still want different results.

Do you not have the intense desire or motivation for change to take place? Ask God to put the desire within you. Cry out to Him to motivate you.