Simply, if you believe that there will be a Divine Judgment for your actions (which is what "Doomsday" or properly termed "Judgment Day" - Yawm al-Qiyaama يوم القيامة), you will behave better on pain of future torture or pleasure of future reward.
Vices & Virtues
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Rene Descartes
There are three: A Fever You Can't Sweat Out, Pretty Odd, Vices and Virtues.
The seven virtues are prudence, justice, temperance, courage, faith, hope, and charity. The seven vices are pride, greed, wrath, envy, lust, gluttony, and sloth.
Yes, they do. They have all the virtues and vices of those of other faiths.
If you don't know yourself, you're alway trying to copy other sometime that nnot you! so know thyself and other.
VIRTUE
Joseph H Kupfer has written: 'Prostitutes, musicians, and self-respect' -- subject(s): Virtues, Vices
Nos vertus ne sont, le plus souvent, que des vices déguisés. Our virtues are, more often than not, only some vices in disguise
Livy wrote to chronicle the history of Rome, to shape national identity, and to educate readers about virtues and vices of past leaders for moral instruction.