Summa Theologica

IIa IIae q. 15 : Of The Vices Opposed To Knowledge And Understanding (Three Articles)

[Letter] [A4] Entire question
[Letter] [A4] 1. Whether blindness of mind is a sin?
[Letter] [A4] 2. Whether dulness of sense is a sin distinct from blindness of mind?
[Letter] [A4] 3. Whether blindness of mind and dulness of sense arise from sins of the flesh?