One True Faith

The concept of a one true faith, one true religion, or one true church, stems from the monotheistic belief in the "one true God", which implies a degree of exclusivism. The claim that one faith is true, and that by implication other religions are false, is based upon the claim that God has spoken to mankind through a revelation intended for all, revealing the will of the divinity.

The concept of "one true faith" is also based on the basic philosophical law known as the law of noncontradiction: two propositions that contradict each other cannot both be true. Therefore, various religious traditions offering contradictory doctrines cannot be affirmed as equally true.