Religion
From Stoic Wiki
What does it matter to me whether the universe is composed of atoms or uncompounded substances, or of fire and earth? Is it not sufficient to know the true nature of good and evil, and the proper bounds of our desires and aversions, and also of our impulses to act and not to act; and by making use of these as rules to order the affairs of our life, to bid those things that are beyond us farewell? [...]
What Nature is, and how she administers the universe, and whether she really exists or not, these are questions about which there is no need to go on to bother ourselves.