As expected, the shark ate every single fish.
 

The marine biologist then inserted clear fiberglass to create two sections within the tank.  He placed the shark in one area and smaller fish in the other section.
 

The shark quickly attacked, but then he bounced off the fiberglass. The shark kept on repeating this behavior. It just wouldn’t stop trying.
 

While the small fish in the other section remained unharmed and carefree, after about an hour, the shark finally gave up.
 

This experiment was repeated several dozen times over the next few weeks. Each time, the shark got less aggressive. Eventually, the shark got tired and simply stopped attacking altogether.
 

The marine biologist then removed the fiberglass. The shark, however, didn’t attack. Instead, it was trained to believe in the existence of a barrier between it and the baitfish.
 

The moral: After experiencing setbacks and failures, many of us emotionally give up and stop trying. Like the shark, we choose to stay with past failures and believe that we will always be unsuccessful. We build a barrier in our heads, even when no ‘real’ barrier between where we are and where we want to go. Don’t give up. Keep trying because success may be just a try away.