He cannot see his own sin because he is busy finding others' sin.

While he asserts he has never done anything wrong, he always finds evil in what others do.

Alors qu'il prétend n'avoir jamais rien fait de mal, il trouve toujours le mal dans ce que font les autres.
(Haya Akegarasu, "The Declaration of an Independent Man," 1917. 暁烏敏「独立者の宣言」大正六年、『暁烏敏の世界　魂萌ゆ』所収、p. 5)