Motif

"'Adults intellectually and during working hours,' he went on. 'Infants where feeling and desire are concerned.'" (94)

               Infants or babies come up often in this book to represent the members in society. This is not because they lack intellect, but more because that intellect is not being put to use other than on one honed skill and they are emotionally unresponsive. Like a baby, these people can not understand love, so they can not greive when someone close to them dies. And, they can not experience the success in accomplishing a long sought out goal, because they are completely happy with life as they know it.
                So, similar to the way that mothers give babies a bottle when they start to get "fussy", so too do the adults of London receive Soma to calm them down and make all of their thoughts disappear. This creates the care free world that they are so accustomed to living in. Soma insures that these people never have to worry about consequences or survival. Just like the way a mother looks after her baby, so too does society look after its citizens.  They will never know trials or tribulations, or joy and accomplishment, because unlike babies, these "bottled" individuals will not grow, but stay in the same position until expired.