Question 80 — Of the Cause of Sin, as Regards the Devil

We must now consider the cause of sin, as regards the devil; and under this head there are four points of inquiry:

(1) Whether the devil is directly the cause of sin?

• (2) Whether the devil induces us to sin, by persuading us inwardly?
• (3) Whether he can make us sin of necessity?
• (4) Whether all sins are due to the devil’s suggestion?