More striking than this permanent need for guidance, so characteristic of philosophers, which leads them to an investigation that only ends with death, is the fact that many, as soon as they undertake it, are satisfied with the answers they find and quietly stop investigating. In other words: knowledge, which, as is well known, the more it grows, the more it opens up the unknown, and therefore the more it raises questions, the more it instigates study, the more it broadens the field of investigation, does not have a similar effect on some minds. It is very difficult not to resort to a predisposition to justify it, and to validate Ortega y Gasset’s observation that a philosopher is simply the one who cannot be anything else.