Berlusconi has flirted with the prospect of selling the Rossoneri this year, which would spell the end of the club, according to Moggi.
"Milan must thank God for Berlusconi," declared Moggi. "If he was to leave, Milan would be finished.
"There is still plenty to come from him at Milan."
Moggi also slammed the signings of new Juve general manager Beppe Marotta.
"The buys aren't impressive. Jorge Martinez does not have the quality to be a Juve player. The only one worthy is Leonardo Bonucci.
"Juve need four good signings to start winning again. But the ones who have arrived, including Marco Storari, aren't good enough."