
Those who believe in God use the following words:
"I swear by Almighty God that I will be faithful and bear true allegiance to Her Majesty Queen Elizabeth II, her heirs and successors and that I will as in duty bound honestly and faithfully defend Her Majesty, her heirs and successors in person, crown and dignity against all enemies and will observe and obey all orders of Her Majesty, her heirs and successors and of the generals and officers set over me."
Others replace the words "swear by Almighty God" with "solemnly, sincerely and truly declare and affirm".
source: Wikipedia
I believe that the option given for believers and non believers portrays Democracy and Freedom. Do other countries have it? I have no idea. But this is a fine example. There may be certain shortcomings in implementing a perfect system. However, the commitment seems to be genuine.