It's interesting to see how our leadership oaths have changed.
Rudd. Sworn oath.
‘I, Kevin Michael Rudd, do swear that I will well and truly serve the Commonwealth of Australia, her land and her people, in the office of the prime minister, so help me God.’
Gillard. Affirmation.
"I, Julia Eileen Gillard, do solemnly and sincerely affirm and declare that I will loyally serve the Commonwealth of Australia in the office of prime minister."
And as a comparison;
Howard sworn oath.
I, John Winston Howard, do swear that I will well and truly serve the people of Australia, in the Office of Prime Minister, and that I will be faithful and bear true allegiance to Her Majesty, Queen Elizabeth II, so help me God.