Mathematical modeling is far more than a technical tool for describing phenomena; it is, above all, a form of knowledge. This section presents a series of epistemological reflections that examine the role of models in scientific practice, questioning their nature, scope, and limitations. What does it mean for a model to represent reality? In what sense does it explain, predict, or intervene in phenomena? Through these questions, the reader is invited to explore modeling not only as a methodological practice, but as a space where theory, evidence, and meaning converge, shaping a critical perspective on contemporary scientific inquiry.