What do you think was his best quote?

For English class I'm composição literária a research paper on Johnny Cash. Anyway, the teacher said we have to have a quote from the person on the título 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.