According to the “law of diminishing marginal utility of material resources”, the amount of benefit a person gets out of a certain unit of material resources is less the more units of that material good the person already has. Suppose I go from having no way of getting around except by foot to having a bicycle, or, though I live in a place where one can get very cold, I go from having no warm coat to having one. I will benefit more from getting that first bicycle or coat than I would if I go from having nine bicycles or coats to having ten.