22 It is in the very nature of material objects that an inordinate desire for them becomes the root of every evil, of every discord, and in particular, of a lowering of the moral sense. On the one hand, things which are naturally base and vile can never give rise to noble aspirations in the human heart which was created by and for God alone and is restless until it finds repose in Him. On the other hand, material goods (and in this they differ greatly from those of the spirit which the more of them we possess the more remain to be acquired) the more they are divided among men the less each one has and, by consequence, what one man has another cannot possibly possess unless it be forcibly taken away from the first. Such being the case, worldly possessions can never satisfy all in equal manner nor give rise to a spirit of universal contentment, but must become perforce a source of division among men and of vexation of spirit, as even the Wise Man Solomon experienced: "Vanity of vanities, and vexation of spirit." ( Ecclesiastes i, 2, 14)
Source: Ubi Arcano Dei Consilio (Vatican.va)