If you think you can't you're right. Autograph your work with excellence. A winner is a loser that was willing to fail and get up, fail and get up, fail and get up, fail and get up and win. Being honest with people eventually works. Goals begin behaviors.
Consequences maintain behavior.
The other half is completing it. The customer may not always be right, however, it's not our job to prove they are wrong. The only time success comes before work is in the dictionary. If you throw dirt you're bound to lose ground. Acknowledge, Apply, Attain.