We must now consider the sins opposed to justice, whereby a man injures his neighbor in his belongings; namely theft and robbery.

Under this head there are nine points of inquiry:

A1 Whether it is natural to man to possess external things?

A2 Whether it is lawful for a man to possess something as his own?

A3 Whether theft is the secret taking of another's property?

A4 Whether robbery is a species of sin distinct from theft?

A5 Whether every theft is a sin?

A6 Whether theft is a mortal sin?

A7 Whether it is lawful to thieve in a case of necessity?

A8 Whether every robbery is a mortal sin?

A9 Whether robbery is a more grievous sin than theft?