Darren Hardy said this quote

When you've prepared, practiced, studied, and consistently put in the required effort, sooner or later you'll be presented with your own moment of truth. In that moment, you will define who you are and who you are becoming. It is in those moments where growth and improvement live--when we either step forward or shrink back, when we climb to the top of the podium and seize the medal or we continue to applaud sullenly from the crowd for others' victories.