Summa Theologica

IIa IIae q. 73 : Of Backbiting (Four Articles)

[Letter] [A4] Entire question
[Letter] [A4] 1. Whether backbiting is suitably defined as the blackening of another's character by secret words?
[Letter] [A4] 2. Whether backbiting is a mortal sin?
[Letter] [A4] 3. Whether backbiting is the gravest of all sins committed against one's neighbor?
[Letter] [A4] 4. Whether it is a grave sin for the listener to suffer the backbiter?