The Athenians had an oath for someone who was about to become a citizen. They had to swear that 'I shall leave the city not less but more beautiful than I found it.'
Stete Not, langsamer Tod.
Oaths are the fossils of piety.
Cursing is invoking the assistance of a spirit to help you inflict suffering. Swearing on the other hand, is invoking, only the witness of a spirit to an statement you wish to make.