These considerations also apply in the field of religious symbolism and belief. But with a certain difference. For some religious believers, instead of being uneasy about holding on to an imperfectly understood belief, make a point of avowing credence in holy mysteries. Tertullian advocated a version of trinitarianism, using the Latin word ‘trinitas’. His formulation ‘tres Personae, una Substantia’ (three persons, one substance) was rendered from the Greek which meant, roughly ‘three substances, one in being’. He is credited with having said: ‘I believe because it is absurd.’