1. arbiter - Noun
2. arbiter - Verb
A person appointed, or chosen, by parties to determine a controversy between them.
Any person who has the power of judging and determining, or ordaining, without control; one whose power of deciding and governing is not limited.
To act as arbiter between.
Source: Webster's dictionaryThe ballot box is the surest arbiter of disputes among free men. James Buchanan
A man's own character is the arbiter of his fortune. Publilius Syrus
Anarchism is the great liberator of man from the phantoms that have held him captive; it is the arbiter and pacifier of the two forces for individual and social harmony. Emma Goldman
I would define, in brief, the Poetry of words as the Rhythmical Creation of Beauty. Its sole arbiter is taste. With the intellect or with the conscience, it has only collateral relations. Unless incidentally, it has no concern whatever either with duty or with truth. Edgar Allan Poe
When I disagree with a rational man, I let reality be our final arbiter if I am right, he will learn if I am wrong, I will one of us will win, but both will profit. Ayn Rand
If your only arbiter of anything is money, really you should... go and rob banks. Bruce Dickinson