Imaginary testing is unreliable, and in many cases, it’s a huge waste of time and energy. In truth you just don’t know what will happen until you try. You may start a business, and it could take off in ways no one could predict. Or it could be a complete failure. You could ask for a date and end up with the partner of your dreams. Or you could be rejected cold. It’s great to visualize what you want, but you never really know what’s going to happen until you act.
Source: Testing to Failure: http://www.stevepavlina.com/blog/2007/05/testing-to-failure/
If we do act, in however small a way, we don't have to wait for some grand utopian future. The future is an infinite succession of presents, and to live now as we think human beings should live, in defiance of all that is bad around us, is itself a marvelous victory.
Excellence is an art won by training and habituation: we do not act rightly because we have virtue or excellence, but we rather have those because we have acted rightly. We are what we repeatedly do. Excellence, then, is not an act, but a habit.