Before the publication of Sidereus Nuncius, the Catholic Church accepted the Copernican heliocentric system as strictly mathematical and hypothetical.[19] However, once Galileo began to speak of the Copernican system as fact rather than theory, it introduced "a more chaotic system, a less-than-godly lack of organization."[20] In fact, the Copernican system that Galileo believed to be real challenged the Scripture, "which referred to the sun 'rising' and the earth as 'unmoving.'"[20]