There's a recurring joke throughout the episode that most of Dr. Wong's patients (besides the Smith family) are coprophages trying to break their habit. Much as the image of the happy family represents successful therapy for the Smiths, so does the image of a man eating normal food represent successful therapy for a recovering coprophage.
The joke is that Dr. Wong leads a "double-profession" (splitting her time between standard family counselling and getting people to stop eating poop) and is unsuccessfully trying to keep those two worlds separate from each other. We see the joke continued later when Morty finds depictions of coprophagy in a booklet during the counselling session.
The words "courage" and "dedication" appear to be arbitrary filler made to resemble a motivational poster.