William Sears determines crying as the child’s pivotal mean of self-expression.[67] Parents are challenged to "read" the crying – which is initially generalized – and to provide the child with empathic feedback in order help him to differentiate and elaborate the repertoire of his signals gradually.[68] Furthermore, he recommends prevention of crying: parents are advised not only to practice breastfeeding, babywearing and co-sleeping as much as possible, but also to get into the habit of properly responding to the early warning signals so that crying doesn’t happen in the first place.[69] Likewise, parents must teach their child that some trivial occasions are no cause for alarm at all.[70]