be the picture of (something)

To be ideal example of something (which is listed after "of"). Yes, Jill was in the hospital a few months ago, but she's the picture of health now. We went running together just the other day. Those photos of you and your family were so lovely. You all are the picture of happiness! Wow, this secluded beach is just the picture of tranquility, isn't it?

be the ˌpicture of ˈhealth, ˈhappiness, etc.

be completely or extremely healthy, etc: She’s the picture of happiness in this photo. ♢ He’s the picture of misery, isn’t he? Look at him standing there in the rain.