Good literature always has an instructive character, even if it is veiled, which allows the reader to grow through reading. That is why it is good for the writer to ask how much a hypothetical reader would gain from reading what he intends to write: depending on the answer, perhaps it would be better to look for other ideas, more convincing, more realistic, less selfish and more individual. Because this is exactly what becomes evident when this exercise is practiced: the best ideas, the ones that will most easily add something to the reader’s experience, are those that are more particular, those that are more intensely lived and more deeply assimilated. In short: one can only teach well what one knows well.