Since another year is coming to an end, many many thousands of people are going to wish to get fit, lose weight, eat healthy, etc. for their New Year resolution. Of course, only a few people will actually stick with it and do it. Now, a lot of people fall of the bandwagon because either they believe it will happen in one day or they start too drastically(i.e.. going out and running 5 miles in one day, completely cutting out caffeine) and so they quit.
Everything is a work in progress, but this quote says a few things: think about what you eat, work for what you've always wanted, you have control over your own body. Generally food that I crave, like McDonalds, will make me feel really crappy soon after I eat it. But when I crave a salad it never makes me feel bad after I eat it and that was a realization that I had to make on my own; and I do still eat McDonalds every once in a while because their fries are just so good. It's just not nearly as much as I used too.
Also junk food is just fluff calories, not good calories, not filling calories.