Why Did Yaakov Say Shema Upon Seeing Yosef?

Perhaps, he was reflecting to himself, after all his name is “Yisroel” as well, and he mirrored the message to his inner being that “G-d is one and His name is one,” and that G-d is the ultimate cause for all salvation. Much mirroring takes place in these Parshiot, specifically by Yosef who saw his father’s image to dissuade himself from sin.