It means, people who are in high and responsible positions, if they go against righteousness, righteousness itself will get transformed into a destroyer.
“It seems a long time since the morning mail could be called correspondence.”
“I enjoy those small chats you have when people come up and talk to you about your work. It only involves a few seconds of effort to be nice to those people, and I am very grateful for the kind words that people have taken the trouble to express to me in person.”