What do te think was his best quote?

For English class I'm Scrivere a research paper on Johnny Cash. Anyway, the teacher detto we have to have a quote from the person on the titolo page (partially my idea because some kid who didn't even know who June was kept tormenting me about wanting to write his paper on Johnny because he knew that's who I'd choose) I can't choose whic quote of his, it can be anything even a song lyric.