Theory of the Mirror Phase
Humans are born prematurely. Left to themselves, they would probably die. They are always born too early. They can't walk or talk at birth: they have a very partial mastery of their motor functions and, at the biological level, they are hardly complete. The infant can't pick things up or move towards or away from things. So how does the child come to master its relation to its body? How does it respond to its "prematuration"?