Quote Investigator : The quote is so entertaining and it fills its niche so well that it is cited repeatedly around the globe. Over the decades the quotation or a close variant has appeared in newspapers such as: Oakland Tribune of California in 1922; The Bee of Danville, Virginia in 1946; Winnipeg Free Press of Manitoba, Canada in 1976; The Sunday Herald of Chicago, Illinois in 1982; the Sun-Herald of Sydney, Australia in 2005; and the Taipei Times of Taiwan in 2008 [SOC1-SOC6]. The words are usually attributed to Socrates and the confusion with Plato is understandable because Plato’s dialogues are the primary source of knowledge concerning Socrates.
In " Persuasion ", when a case came up in his hometown of Las Vegas, Reid calls his mother's sanitarium, intending to visit her. He is surprised to learn that her mental condition was beginning to improve, as she wasn't signed into the sanitarium as frequently and was actually allowed to have a supervised vacation to the Grand Canyon simultaneous to the investigation. When asked about it, Reid stated that he was overjoyed to learn about this, although he also expresses his belief that his mother might have actually forgotten about him, since they barely kept in touch. By the end of the episode, Reid receives a number of postcards and a golden collectible miniature of the Grand Canyon from Diana. These gifts please him, as that meant his mother still thought about him.