Every sentence is a riddle wrapped up in an enigma.
"If I thought I would do that, I would resign tomorrow."
So, it's not if he actually did something, it's if he THOUGHT he might do something.
But why would he think he might do something so terrible, that he wouldn't do it?
Does his mind have no control over what he does, perhaps?
That might explain an awful lot.
It's also interesting to note that he wouldn't resign today. No, he'd wait until tomorrow.