Thomas Aquinas

“ Reply to Objection 3: All vices are opposed to prudence, even as all virtues are directed by prudence: wherefore if a vice be opposed to prudence alone, for this very reason it is deemed less grievous. ”

“ For not only is the prodigal on the way to old age, which is opposed to prodigality, but he is easily reduced to a state of want, since much useless spending impoverishes him and makes him unable to exceed in giving. ”

“ But covetousness, as opposed to liberality, relates to certain passions whereby man is affected towards money: whereas prodigality does not seem to relate to any passions of the soul, since it is not affected towards money, or to anything else of the kind. Therefore prodigality is not opposite to covetousness. ”

“ Prodigality regards passions in respect of money, not as exceeding, but as deficient in them.
Reply to Objection 3: The prodigal does not always exceed in giving for the sake of pleasures which are the matter of temperance, but sometimes through being so disposed as not to care about riches, and sometimes on account of something else. More frequently, however, he inclines to intemperance, both because through spending too much on other things he becomes fearless of spending on objects of pleasure, to which the concupiscence of the flesh is more prone ”

“ That an illiberal or covetous man refrain from taking what belongs to others, although this appears in itself to call for praise, yet on account of the motive for which he does so it calls for blame, since he is unwilling to accept from others lest he be forced to give to others. ”