Cumulative progressDiscarded attemptsEmpirical methodgrowth mindsetInnovation processpersistencePractical optimismProductive failureresilienceThomas EdisonTrial and error인내토마스 에디슨 24 Jul 2025 Thomas Edison. [토마스 에디슨] - I am not discouraged, because every wrong attempt discarded is another step forward. "I am not discouraged, because every wrong attempt discarded is another step forward." - …