Forum:KB:Ability to use the Force is diminished

In the Star Wars: Attack of the Clones, Mace Windu mentions to Yoda after the their conversation with Obi-Wan Kenobi about it being time to inform the Senate that their ability to use the Force had been diminished. I have looked but have found nothing regarding this but in what way was their ability diminished? Their ability to see the future or was it also physical? --CookieCrumb 22:19, March 29, 2014 (UTC)