The usual quip that people make at this time of year is that Shabbos Hagadol is called that because of the Rabbi's speech...I think we would wish to be able to sit through one of those this year...

But why is called the great Shabbos? Why more than any Shabbos? And greater than Shabbos Shuva?

Yes...the secret lies in understanding that Machiavelli was wrong - fear is inferior to love...