"Do not be too timid and squeamish about your actions.  All life is an experiment.  The more experiments you make the better.  What if they are a little course, and you may get your coat soiled or torn?  What if you do fail, and get fairly rolled in the dirt once or twice.  Up again, you shall never be so afraid of a tumble." 
- Ralph Waldo Emerson

Some people develop courage from their experiences.....

"Courage is not the absence of fear, but rather the judgement that something else is more important than fear."
- Meg Cabot

"It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends."
- J.K. Rowling, Harry Potter and the Sorcerer's Stone

"Healing takes courage, and we all have courage, even if you have to dig a little."
- Tori Amos