ストックデールはベトナム戦争で7年半、戦争捕虜を経験し生還した。ジェームズ・C・コリンズの「ビジョナリー・カンパニー 2 - 飛躍の法則」(2001年、日経BP社、ISBN978-4822242633
、原題 Good to Great)において、コリンズは、ベトナムの捕虜収容所での経験についてストックデールに取材しており、ストックデールの以下のような言葉を記している。
I never lost faith in the end of the story, I never doubted not only that I would get out, but also that I would prevail in the end and turn the experience into the defining event of my life, which, in retrospect, I would not trade.
Oh, that’s easy, the optimists. Oh, they were the ones who said, 'We're going to be out by Christmas.' And Christmas would come, and Christmas would go. Then they'd say, 'We're going to be out by Easter.' And Easter would come, and Easter would go. And then Thanksgiving, and then it would be Christmas again. And they died of a broken heart.
This is a very important lesson. You must never confuse faith that you will prevail in the end—which you can never afford to lose—with the discipline to confront the most brutal facts of your current reality, whatever they might be.