When you fail to respond to your crying newborn all they learn is that you are unreliable, not to be patient. Crying is not a pass time, the baby is not just crying to cry as others have mentioned. In addition to getting the physical needs that have prompted the crying met, the baby is learning to depend on you to meet their needs and respond appropriately. If repeatedly the baby is not responded to, the child learns you are not to be trusted to meet their basic needs. Although, it seems that all an infant does is cry, soon enough they will be able to express themselves more fully, in the interim, make sure you infant feels safe, loved, and cared for above all else.