Cumulative progressDiscarded attemptsEmpirical methodgrowth mindsetInnovation processpersistencePractical optimismProductive failureresilienceThomas EdisonTrial and error์ธ๋ดํ ๋ง์ค ์๋์จ 24 Jul 2025 Thomas Edison. [ํ ๋ง์ค ์๋์จ] - 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." - …