The phrase 'power axiom' refers to a statement that is considered to be self-evident or universally accepted as true. Other synonyms that can be used instead include 'maxim' or 'principle'. These words represent a fundamental idea or rule that is widely recognized as factual. Another similar word is 'truism'. Truism is a statement that is so obvious and true that it hardly needs to be said. It is a statement that is universally accepted as self-evident. A related phrase to 'power axiom' is 'golden rule'. This is a principle which states that we should treat others in the way that we would like to be treated, and is a universally accepted moral truth.