Push/Pull your cart forward with feelings

Desire of doing something, and fear of not being able to do it are like two forces that moves a cart: one pulls it, another push it, both to the same direction.

But what about pleasure and pain? Those should be two more forces trying to move the same cart. Bring them to help too.

You can re-focus both negative and positive feelings to make your cart of motivation to move. For example, you love to earn money and you hate to lose it. These opposite feelings may have a common goal: move you to improve your economy.

But I have noticed that, although this playing could be great, it may tempt you to do more than what you are essentially able to do. And when this happens, sadness appear because of that difficulty.

In my case, I have no parallel thinking ability, so I should concentrate on only one thing at a time.