We must now consider thankfulness or gratitude, and ingratitude.
Concerning thankfulness there are six points of inquiry:
A Whether thankfulness is a special virtue distinct from other virtues?
A Who owes more thanks to God, the innocent or the penitent?
A Whether man is always bound to give thanks for human favors?
A Whether thanksgiving should be deferred?
A Whether thanksgiving should be measured according to the favor received or the disposition of the giver?
A Whether one ought to pay back more than one has received?