I have a quote attributed to Nathan Knorr.
Hi van,
Part of what you quoted, NHK said. About the Bible, Jesus, etc. He also said that in conversation to different people.
I never heard him say that he doubted 1914. The opposite is true. He expressed that he was convinced about the date.
However, I want to clarify that when he said he knew Jehovah the Bible etc., he did not say he wasn’t sure about 1914 or other beliefs. He only spoke about what he knew were true not about other beliefs being true or not true but on other occasions he expressed that he was convinced about the end of the Gentile Times.