Catholic Treasury Network
Part IIa IIaeFaithQuestion 13

Blasphemy

  1. Blasphemy is a direct disparging of the divinegoodness. It is therefore a sin in conflict with the faith. For hewho has the faith confesses to the divine goodness.

  2. Blasphemy, by its genus or the generalessential class of sins to which it belongs, is always a mortalsin.

  3. We have seen that unbelief is the greatest of sinsagainst faith. Blasphemy is an emphatic form of unbelief. Hence, inspeaking of sins against faith, blasphemy is often called the worstof sins.

  4. The wicked in hell detest the divine goodness andjustice, and thus they blaspheme. It is believable that, after theresurrection of the body at general judgment, human beings in hellwill utter their blasphemies audibly.

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Full Summa Text · II-II, Q. 13
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