Success is defined as an accomplishment of a purpose, failure is defined as lack of success.
Therefore, success is different for everyone. Success doesn't equal lots of money, success doesn't mean having an ideal romance, nor does it add up to owning expensive possessions. Success is conquering whatever purpose you are aiming for. Success is basically accomplishing a goal or goals you have set for yourself. No one is ever completely successful, once a set of goals are met, new ones are set and the MAIN goal is to continue succeeding. Failure, it's only the learning process in succeeding. You fall, not to stay on the ground, but to stand up again and do it over, only this time wiser. Failing to succeed is nothing but a trial and error process, a system of guess and check until we come up with a theory that works. Don't give up, it's only TRUE failure when you quit trying.