Shakespeare once said," Cowards die many times before their death." In my oppoin, this sentence points out the foolishness of the ones defeated by thier own bluff.
In reality, there are times when we fail just for our own bluff. We don't dare to compete merely because of the fear of failure, we're not willinf to show ourselves just becaause that we're afraid of making a fool of ourselves and being scoffed.
It's only human to want to show the best of ourselves. After all, no one wants to be a joke in others' eyes. But there's no need to be too much about others' ideas. As a result, we we thingk too much and get nowhere. In fact, things may be not as bad as we think, in many cases.
In a word, do ont corss the bridge, until you come t it; never fall over your own bluff. So, be brave to try and work.