這句格言係講正義, 你可以用英文寫出來嗎 ?

美德: virtues, (good) morality ; faith
正義: justice, rightfulness
福利: welfare, interests
共同: mutual , (public)

Among all virtues, justice is the most beneficial to keep the mutual welfare in a society fare.

Among all good morality, justice is the most beneficial regarding to the public interests.

Among all virtues, rightfulness is what to keep the public interests fare.
(This sentence is a bit different from that Chinese one)

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Hope this would be useful for you :D !

Among all faith, Justice is of most benefit to public interests.
that means that everyone should be a kind person....