I recently listened to a talk given by Vinod Khosla from Khosla Ventures I was struck by how frankly he answered questions and by the depth of his knowledge on the subject matter. Very impressive.
Then he said something that really struck a cord with me, mainly because I have a similar opinion and therefore it is always good to get some personal reinforcement:
Try and fail but never fail to try
This is very similar to my personal mantra
you cannot win the race if you are not in the race
Overall, if you ever get the opportunity to hear him talk I would highly recommend it.