How often people put, rather anxiously, the question: How do I know if I have a vocation? It is not easy to answer, and part of their anxiety comes from the fact that, as likely as not, they are looking for a cut-and-dried answer that can seldom, in the nature of the case, be given. The following of a vocation is a venture of faith. But it still remains true that the venture ought to be made with prudence. My aim in these articles is to examine first what a vocation is, and secondly what kind of answer can be given to the question just put. It is, after all, a question that many, besides those who feel themselves drawn to consecrate their lives to the service of God, may be called upon to face. Parents and priests and teachers may have to help solve it. And experience shows that all too often they have but the vaguest idea how to set about it.