[kjksf]

"Don't mistake your vocation" doesn't mean "follow your passion".

Paraphrasing, it means "do what you you're naturally good at"

"Unless a man enters upon the vocation intended for him by nature, and best suited to his peculiar genius, he cannot succeed".

[Retra]

You'll still end up moving around until you find out what you're great at. Unless by some freak accident you know from the start. For instance, there's _something_ that I'm probably a world-class genius at - I have enough experience being me to suspect that - but I have a very hard time putting it into words what I do, and an even harder time trying to monetize it.

[Joeri]

If you're not naturally good at any particular thing, then just doing something enjoyable is a good second. Perseverance is the key to success, and it cannot exist without passion.

[solidsnack9000]

Being good at something and being enthusiastic about it are not at all the same thing.