Neither fear nor self-interest can convert the soul. They may change the appearance, perhaps even the conduct, but never the object of supreme desire... Fear is the motive which constrains the slave; greed binds the selfish man, by which he is tempted when he is drawn away by his own lust and enticed (James 1:14). But neither fear nor self-interest is undefiled, nor can they convert the soul. Only charity can convert the soul, freeing it from unworthy motives.
Bernard of ClairvauxPride only, the chief of all iniquities, can make us treat gifts as if they were rightful attributes of our nature, and, while receiving benefits, rob our Benefactor of His due glory.
Bernard of Clairvaux