The sense of duty is, as long as it is put into practice, the most efficient fuel for a satisfying life. Beyond this, however, it is worth highlighting the splendid effects experienced by those who keep the desire to learn burning throughout their lives. It does not matter at what age, it is enough to feel it and the days dawn differently, one wakes up with a different motivation. And the whole process of learning, with its small progress, overcoming difficulties, broadening the horizon of study, makes the days more stimulating and generates the expectation of tomorrow. Similar satisfaction, so long-lasting and so healthy, may not be found in any other way.