Summa Theologica

Ia IIae q. 80 : Of The Cause Of Sin, As Regards The Devil (Four Articles)

[Letter] [A4] Entire question
[Letter] [A4] 1. Whether the devil is directly the cause of man's sinning?
[Letter] [A4] 2. Whether the devil can induce man to sin, by internal instigations?
[Letter] [A4] 3. Whether the devil can induce man to sin of necessity?
[Letter] [A4] 4. Whether all the sins of men are due to the devil's suggestion?