I'm about to teach you something... and, yes, it's about grammar.  I've seen this done in some poorly edited books before and it mildly bugs me.  So, listen...  When you're writing a quote inside of a quote, don't make it a quote.  That probably sounded confusing as... okay, I'm keeping it clean here, so just …

Continue reading I said, “Kari said, ‘listen… and learn!'”