They are short, totally heterogenous, you jump from the pillar to the post, even this evening, if I've understood well, the topics bear no relation with one another, it's varied, why? because it interests  the audience, the reader, it's assumed to be very elegant, of course, a beautiful rhetoric, so you must have the metaphorical means to express yourself and so you have patterns that are completely  against the current trend of the time at this period, where we like big,  systematic and boring treaties and we try to vulgarize it, that is to introduce an educated audience to extremely deep and  diverse topics, that can be of interest to the entire planet. 