Includes 11 new illustrations and new definitions and algorithms. In the essence of the human being, there is change, ... which makes him what he is. The change obeys the decisions, ... that may or may not be conscious. Decisions originate in "we know or we believe." The first is "demonstrable". The second is "an act of faith" (necessarily no less truthful, nor less impactful). Both, finally, are our means / tools, to direct our future. What is the interest of knowing-believing about? ... And in this case, what to know? What to believe?- This book exposes what two lives seemed to discover / understand about the world. Of course it is not much; But these experiences may help others to choose theirs. It is not strange to us that other approaches or readings of the world can be based on our demands and be equally valid.- This is not a book to entertain us or learn from others. This is a book that will allow us to put our ideas to the test, argue, place an order in what we know and believe, and discover who we are through what we think, incite us to reflection and "improve" our "knowing and believing".- With a certain frequency, ideas will be presented, that although the authors do not share, either in whole or in part, they consider that they should at least be expressed to the reader, known by the same, to whom in our view, it is suggested that always If you can, see them under their role as "judge" or at least as apprentice, of course, not always having to issue a verdict for each one of them, frequently a seed sown for reflection on the matter, will allow germinate an admirable tree to who believes it.- We believe that we frequently give only one opinion and that this may not be the only valid one, or even not always valid. This does not mean that we are not careful in what we say or that we do not respect what we consider to be "the truth."- Knowledge, information, concepts, ideas, etc. included in this material, are basically the result of reading, experience, reflection of the authors on materials developed by some of whom we admire as "giants of science and human wisdom", for which they are NOT declared originators of the main ideas exposed throughout the book, rather they assume a degree of responsibility over their selection and the development of a certain degree of argumentation "concordant or dissenting" of the selected material.- It should also be noted that occasionally some contributions are made that we consider to have a certain degree of originality, meaning that observations or development of ideas have been made, which they do not consciously recall having seen expressed by other authors.- The work presented is not a thesis, nor does it intend to demonstrate "something", it is shown as a set of ideas that is made available to those who are interested for reflection and possible enrichment of knowledge, spirituality and beliefs, among other aspects already either by reaffirming their own ideas, by the benefit of "forgetting" what would be contextual errors in our knowledge, or increasing our understanding of the world with new and fresh ideas.
