These two things are connected. The first is your depression speaking, keeping you down so that you aren't motivated. Then, the not being motivated makes you believe the first statement.

If life was a computer game, no one would play it. There often isn't enough reward, and reward is something that anyone who makes a game devotes a lot of thought to. We have to make our own rewards so that we can encourage and motivate ourselves.

I think that the entire world has this false idea that punishment is a motivator, and it's a complete lie. Be easy on yourself. It's the only way.

I hope that made sense and helped a little bit...