Imagine a future civilisation in which our technologies are so advanced that money has been rendered obsolete. Work, as something that one needs to do to earn an income which will pay for your survival or improve your standard of living, no longer exists. Now think: in such a scenario what would I do with my time now that I have all day to do what I want? Try and imagine something that you could spend most of your time doing without really needing to do it. If something comes immediately to mind that is probably your vocation in life. If nothing does then you’ll have to look harder for it. Or perhaps you can think of many things, in which case you probably have a holistic vocation that does not limit itself to specific areas and you’ve got a Renaissance soul.
What this also gives us is a measure of progress. The standard of living in a society improves when we can all actually do what we really want to do. Only when we have liberated society from the money system will we be able to make it a vocation-driven one.