Brent Shen

“Human infants begin to develop specific attachments to particular people around the third quarter of their first year of life. This is the time at which the infant begins to protest if handed to a stranger and tends to cling to the mother or other adults with whom he is familiar. The mother usually provides a secure base to which the infant can return, and, when she is present, the infant is bolder in both exploration and play than when she is absent. If the attachment figure removes herself, even briefly, the infant usually protests. Longer separations, as when children have been admitted to hospital, cause a regular sequence of responses first described by Bowlby. Angry protest is succeeded by a period of despair in which the infant is quietly miserable and apathetic. After a further period, the infant becomes detached and appears no longer to care about the absent attachment”
― Anthony Storr, Solitude a Return to the Self