Proverbs 28:1 The wicked flee when no man pursueth: but the righteous are bold as a lion.
During his first year of graduate study at the University of California at Berkeley, George B. Dantzig arrived late for a statistics class. He saw two problems on the blackboard. Assuming they were homework, he copied them and a few days later turned in his solutions. One Sunday morning six weeks afterward, the professor appeared at Dantzig's door, waving a manuscript. It turned out that the professor had merely written two examples of unsolvable problems on the blackboard. The manuscript was Dantzig's work readied for publication. George Dantzig later became known as the father of linear programming.
Had this guy gotten to class little earlier to hear the professor say that these problems "couldn't be solved", sadly, he might have never even have tried to solve them -- probably like all the other students in the class. We humans give up way too easily -- someone says it can't be done and we don't give it a second thought! The word "chutzpah", in Hebrew, means nerve or gall. We often view those words in a negative light but God is calling us to to GREAT things and be bold for Him -- and most of the time those things require some chutzpah!
We need to be a bit more tenacious as believers. Is there something you feel God is calling you to do but others have been less than encouraging? Go for it! Be bold! Don't let others dictate what you should or shouldn't be doing -- leave that to the Lord!