Understanding the two groups of people - disciplined vs. lazy

There are two groups of people in the world - the disciplined and the lazy. The disciplined individuals have strong willpower and are able to stick with their goals and tasks day after day. They exercise regularly, eat healthy, and consistently follow through. On the other hand, the rest of us often start off excited about something new, but eventually lose interest and struggle to maintain consistency. We use willpower to overcome our mind's resistance to our tasks, but as time goes on, our willpower starts to decline, and we abandon our initial pursuits.