If he had accepted payment, he wouldn't be able to say "yes" or "no" So he was a photographer by day, and a forger by night for 30 years.
만약 돈을 받으면, "그렇다" 혹은 "아니다"라고 말할 수 없었겠죠. 그래서 낮에는 사진사로, 밤에는 서류위조를 하면서 30년 동안 살았습니다.