I read an amazing quote while cleaning my office today. If you don't get a laugh out of this you're not a theologian.
That's not intended as a compliment, but you're welcome to take it that way.
From Ortberg's recent article in Leadership Magazine:
Somebody asked Dallas Willard once if he believed in total depravity. His reply was that he believed in "sufficient depravity." Never having run into that doctrine before, the interviewer asked for clarification. Dallas said "I believe that every human being is sufficiently depraved so that no one will ever get into heaven and say 'I merited this.'"
Absolutely priceless. I love Ortberg and Willard both, so this a duofecta (almost a trifecta).
I'll leave a lengthy analysis of Calvin's shortcomings as a theologian to more patient persons, choosing here only to note that he, alone of all the Reformers, was not trained as a pastor. He was a French lawyer. That doesn't mean he can't be a good theologian, but it does go a long way towards understanding the theological position he constructed.