I would say failure really is dictated by how you define success.
One person`s failures may be another`s success in a given situation. Say you were looking for a ratio of 40% sales based off of cold calls to 500 homes.
Another person making calls to the same 500 may be willing to accept a 20% sales to call it a success and the end to a happy day.
I think the actual failure is the unacceptance of what you are willing to settle for.
I succeed every day in life due to the fact that I`m able to get out of bed every morning, get on the computer and get some work done, play some video games in the course of the day, get my dog out of the pen and let her sit on my lap and just love on her, and then get to see my wife when she comes home from work.
I go to bed each night satisfied that I`ve accomplished things I needed to get done and those which I wanted to do. That to me, my friends, is my success.