The Power Gem, as you may have guessed,
yields immense power, while the Mind Gem boosts its holder's existing mental capabilities, sometimes resulting in augmented telepathy and telekinesis.
As restraint
yields immense emotion in the story, so too does simplicity and silence accrue a devastating
power on the aural and visual planes (the latter courtesy Haneke's inspired and exceedingly proficient D.P., Darius Khondji, who's also been responsible for the look of such diverse other pictures as Panic Room, several The Immigrants, and Haneke's own U.S. remake of Funny Games).