how do the powers of a Sylph work? i never understod the whole passive creation thing

A Maid and a Sylph can both Create in the exact same way, Passive/Active is a leaning that doesn’t need to be strict when it comes to the ways you interact with the Aspect. That being said, Active and Passive Creation, you can have “Creating your Aspect” and “Creating through your Aspect”, which, I feel is easy enough to understand! Active Creation is Creating the Aspect itself, a Maid of Mind would Create Thoughts in other people’s Minds, or may grant a Mind to a robot or non-sentient object. Passive Creation, however, as Creating Through your Aspect, for example with a Sylph of Mind to follow the prior example, Creating Through Mind may allow them to come up with a way to Make something happen, or create things through their Thoughts, making Thoughtforms Real, as some sort of wish-granting fairy.