How do deep passions form?

Some say there is an upward spiral of motivation:

A bit of interest followed by a bit of achievement can lead to a bit of perserverance.

So a curious dart thrower (interest), enters a tournament and comes third (achievement), and is inspired to practise and deepen their skill (perserverance).

And thereafter, there is an increasingly upward spiral of greater interest, greater achievement and greater perserverance.

This topic is worth reflecting on further, both to understand how to develop own passions, but also to help others develop theirs.