If someone you know is looking for direction in life, point them to “How to Discern the Elements of Your Personal Vocation” by Peter Ryan, SJ. It’s an excellent essay that sets forth “points to bear in mind,” the first of which is that “sincere discernment infallibly succeeds.”
Another point is that we “discern only what to try.”
After all, we do not know the future, and we could die at any moment. The real possibility that we could die before we carry something out or that other things could intervene and make something impossible should warn us not to conclude that we are definitely called to do something in the future, but only that we are called to try to do it. Often enough, all God wants is the effort; and if we make the effort, we produce the results he desires.