The presence of a specific theme or question. The theme of the essay is always concrete, some researchers say that it has a private character. Such are, for example, the themes of M. Montaigne's essays: "About Old Age", "About Fame", "About Self-Esteem", "On Books," "On Bad Means Serving a Good Purpose," "Against Idleness," "On the Thumb Thumb of the Hand," “college paper review”,...