Every weight loss story has a start and an end, and that 'start' picture is your motivation to carry on going. If you follow your plan properly, the first picture you take is the worst you'll ever look. Every day from then on, you'll look a little healthier, and you'll be able to take a little more pride in your appearance. If you carry on taking pictures, you'll be able to chart the changes as they happen. That should give you the motivation to carry on.
This man wasn't enormously obese on 'day one' of his journey, but he was carrying enough extra weight for his situation to make him unhappy. By the time he took the picture on the right, he'd lost an incredible 100lbs, but he's still not smiling! That's because he doesn't consider his journey to be complete yet. Having lost all that weight, now he wants to start adding some muscle.