We must now consider the cause of sin, on the part of man.
Now, while man, like the devil, is the cause of another's sin, by outward suggestion, he has a certain special manner of causing sin, by way of origin.
Wherefore we must speak about original sin, the consideration of which will be three-fold: (1) Of its transmission; (2) of its essence; (3) of its subject.
Under the first head there are five points of inquiry:
A Whether man's first sin is transmitted, by way of origin to his descendants?
A Whether all the other sins of our first parent, or of any other parents, are transmitted to their descendants, by way of origin?
A Whether original sin is contracted by all those who are begotten of Adam by way of seminal generation?
A Whether it would be contracted by anyone formed miraculously from some part of the human body?
A Whether original sin would have been contracted if the woman, and not the man, had sinned?