Getting a second chance to do something gives someone the impetus to try harder to make it work. Many people are surprised when they get another chance because people rarely are awarded two chances. In order to make the most of it, forget what you had done before.
Do not keep looking back at what you had not accomplished. Keep your past mistakes in the past and reach out to the new beginning with excellence. Your faith should not falter at this stage because you need to believe that you were chosen because you are up for the task. Lift your head up high and show your mettle.