Up to Latin
Da mihi Deus
serenitatem ut eis quae mutare non possim concedam
virtutem ut ea quae mutare possim mutem
et sapientiam ut iternoscam
It would seem that the vocative singular for deus is unattested in the classical period. During medieval times, deus was used for the vocative.
“The tendency to worry about things that cannot be changed or corrected.” —Cicero, Six Mistakes of Man?
Ah...here’s all six:
I need to find the originals...
...although these rules are attributed to Cicero, it seems that noöne bothers to give a reference to an actual work by Cicero in which they appear. I’m beginning to question their provenance.