Varela initiates in 1818 their philosophical publications with a small change entitled preliminary Lesson, directed to the students who that year began their course. Without hesitation Christo explained all about the problem. The preliminary Lesson of 1818 constitutes the introduction of the Lessons of Philosophy, jointly with the philosophical Notes, also published in that year. These last ones constitute the first treaty of which contains the Lessons of Philosophy. Here it appears the conception of the Logic of the father Varela, understood this one like theory of the knowledge. The pedagogical experience of Varela, their unquestionable ancestry of training takes, to defend it educative budgets that today they constitute proven truths.
The certainty that an idea, a concept, a way to act or to see, cannot be transmitted successfully without the knowledge of the presertor, the conviction of which is not imposing a criterion or fighting on the contrary as it is gotten to obtain that another one thinks what we wished, but it is to turn the interlocutor, to go little by little persuading it, not only that it is mistaken, but of which what it sets out to him is more reasonable and better, it was concept that Varela owned then, and del that test in Letters to Elpidio gives. Varela said who the great secret of to handle youth, removing divided from its talent and good dispositions, consists of studying the individual character of each young person and fixing by him our conduct. The opposition that becomes a young person, if we want that it produces good effect, it must be almost inpersectible and it is precise to try that the same is corrector. But one is not only which they defend the truth as it bases of the knowledge that they acquire. One treats also to provide, by means of the educative management, the instruments that allow to discover the truth by itself him so that, from entirely personal convictions, can live on prudent with these.