These things and conditions are not products of chance, but exist and change according to the definite order of laws, or truths. This order of truth is expressed pre-eminently by the law of causation, which is assumed by Buddhism to be universal and irrevocable throughout all changes of the world. “That being present, this comes to be; because that has arisen, this arises” — this is the key-note of the Buddhist view of the world.