Topic and reason for some, these terms designate the same thing; others consider them to be different. The truth is that it is not so easy to perceive differences that arise. It is convenient to consider the reason as a type of topic. Wolfgang Kayser explains these topics separately and let see the more general concept of topic, since, according to him, in studies on the topics include reasons and other types of literary traditions: the research of the topics has two aspects. Firstly, investigates the literary tradition of certain fixed and concrete images, motifs or also stereotyped thoughts, and, on the other hand, pursues the tradition of certain technical modes of expression (Kayser, 1970, 93). The topics are topics, contents, typical situations or literary forms that are repeated over several times in the literature and have become literary traditions whose original source is difficult to define. They have gone from writer to writer, a time to time, and they have undergone changes, but they have preserved their essence in much meaningful units that relate to an action or content of the work and that have become typical experiences for the human soul.
They enable us to identify in advance a typical situation which has already been dealt with in earlier works. The topics are fixed cliches or schemes of thought and of expression coming from ancient literature and which, via medieval latin, penetrated in the national literatures of the middle ages and, later, the Renaissance and the Baroque. There is a wealth of poetic images, fixed formulas and technical ways to expose, which are learned and not despise nor the greatest poet (Ibid., 91-92). Among the most popular topics are: the tradition of the pleasant landscape, the Nightingale, the of the wounded deer and source; the topic of consolation, false modesty, the fate or predestination, that of the exordium, the retired life or beatus ille (blessed one), free will, the glory of Fame, the world upside down, of the child and elder, the elder and the moza, the nature goddess, or mother nature, the carpe diem (taste the day), the Golden mediocrity (aurea mediocritas), the crime of being born.