When you spend years going to work every day in the presence of external sources of motivation (a boss who could fire you, a mortgage to pay, coworkers who depe

When you spend years going to work every day in the presence of external sources of motivation (a boss who could fire you, a mortgage to pay, coworkers who depend on you, etc.), it's easy to underestimate just how much of a factor those sources play. It's quite difficult to have to rely entirely on intrinsic motivation to get things done if you don't have a lot of practice doing so.