“Correct me if I'm wrong, but hasn't the fine line between sanity and madness gotten finer?”
“The line between confidence and arrogance is very fine, Josh,” Flamel said quietly. “And the line between arrogance and stupidity even finer. Sophie,” he added, without looking at her.”
“It does, Tennyson, because there’s a fine line between confidence and arrogance. There’s a fine line between being assertive and being a bully. And you’re on the wrong side of both lines.”
“Seems to me that there is a fine line between insanity and dedication…I call that line commitment”
“There's a fine line between piety and wack-ass obsession, and people have been landing on the wrong side for thousands of years.”
“I'm not so sure he's mad, Father. Just a little devious in his sanity.”