I came across an article by Aaron Wong entitled: Boarding the Positivity Plane: 10 Benefits of Optimism. In it he talks about being either on the "Pain Train", or the "Positivity Plane". This concept of relating your outlook to different transportation methods can also be applied to goal setting.
When we set our goals we like to look at all the possibilities. These possibilities give us options we can choose to set our course to reach those goals. Using the Train versus Plane analogy we can see how having a pessimistic or optimistic view can effect those options.
When you have a pessimistic view you tend to focus on the negative. This negativity restricts you to a narrow view much like being on a train restricts you to a narrow track. This track does not allow for much flexibility in the options you have when it comes to your destination. You are forced to follow the track and hope for a switch somewhere along the track. Whereas a train only travels along on the ground— a plane can travel in three dimensions.
The troubles of the world tend to weigh ourselves down. This in turn stops us from taking flight. Many times we talk about being grounded. This doesn't mean that our options should be grounded as well. With a positive optimistic view your mind is free to see all the possibilities ahead of you.
Therefore, let your soul take flight. Don't be afraid of heights and take those risks. Not only will you see more options to choose from— but the view is pretty great from up there as well.