mistake...

Mistakes are a part of being human. Appreciate your mistakes for what

 they are : precious life lessons that can only be learned the hard way. Unless it's

 a fatal mistake, which, at least, others can learn from.

A life spent making mistakes is not only more honorable, but more

  useful than a life spent doing nothing.

                I have learned throughout my life as a composer chiefly through my
                mistake and pursuits of false assumptions, not by my exposure to
                                            founts of wisdom and knowledge.

                                  everthing will change but the heart is never change...