With the surging in of the thick Flame Soul, a mass of information was also flooding in, causing Negris to jolt with excitement, yelling out, "It's updated! My knowledge has been updated!"
The God of Knowledge, known to be all-knowing, relies on such ability of worshippers to update the knowledge base. If the worshipper wishes to worship it, the knowledge the person holds will be transferred over, becoming part of the god's knowledge system.
This kind of ability has its pros and cons. On the bright side, the more worshippers it has, the richer the knowledge system becomes, even obscure knowledge can be somewhat picked up. On the downside, the knowledge of the worshippers tends to run shallow, rarely involving anything especially arcane. If a scholar who delves deeply into a certain discipline doesn't believe in it, then it wouldn't know of what those scholars delve into.
This is the main reason why it's being mockingly referred to as the 'God of Common Sense'.