Timothy Archibald is another artist I've discovered in Art Photo Index's (API) new online exhibition titled "Fear & Loathing", which was curated by Katherine Ware, Curator of Photography at the New Mexico Museum of Art. Although most of the work on his website is quite humorous in nature (and worth checking out!), Archibald has done a project called Echolilia, a beautifully conceived and executed series of pictures that examines the power and vulnerability of his son Elijah, who was diagnosed with autism at the age of 5. (Echolilia is also available as a book.) Echolilia is the "automatic repetition of words or phrases just spoken by others", and is often a symptom of autism. The New York Times has published an article that goes into more depth about this project.
For me, the following picture is the perfect expression of this exploration of Elijah's world and of the vulnerability that his father Timothy saw in it: