Arms & Equipment: Chaos Features, Insight Roll???

[PhilHibbs]

Page 20, Chaos Feature Table, roll 39, Heart of Wealth:

6 = The gem offers 1D8 uses of a randomly chosen Sorcery spell at a Magnitude equal to the creature’s POW divided by 3. Using the spell requires the owner to make a successful Insight roll.

Insight to cast the spell?

Insight is the ability to read a person’s verbal and non-verbal behaviours and signals to determine their motives and state of mind.

Is that right? The Divine version of the crystal requires a Persistence roll, which is a little more appropriate.
This also makes me think, what is needed to use a Sorcery Spell Enchantment? Is it automatic? If so, what would the target roll their resist skill agains?