[Antoninus]

And the notion that all virtues came exclusively from Christianity is preposterous. As if the pagans threw out the baby with the bath water.

Actually, the pagans did practice infanticide with some regularity....

Of course, the Romans had virtues of their own. It was these virtues that made the segue to Christianity so natural and easy for them.

[ffusco]

Roman virtues:
Auctoritas: "Spiritual Authority" The sense of one's social standing, built up through experience, Pietas, and Industria.

Comitas: "Humor" Ease of manner, courtesy, openness, and friendliness.

Clementia: "Mercy" Mildness and gentleness.

Dignitas: "Dignity" A sense of self-worth, personal pride.

Firmitas: "Tenacity" Strength of mind, the ability to stick to one's purpose.

Frugalitas: "Frugalness" Economy and simplicity of style, without being miserly.

Gravitas: "Gravity" A sense of the importance of the matter at hand, responsibility and earnestness.  

Honestas: "Respectibility" The image that one presents as a respectable member of society.

Humanitas: "Humanity" Refinement, civilization, learning, and being cultured.

Industria: "Industriousness" Hard work.

Pietas: "Dutifulness" More than religious piety; a respect for the natural order socially, politically, and religiously. Includes the ideas of patriotism and devotion to others.

Prudentia: "Prudence" Foresight, wisdom, and personal discretion.

Salubritas: "Wholesomeness" Health and cleanliness.

Severitas: "Sternness" Gravity, self-control.

Veritas: "Truthfulness" Honesty in dealing with others.