A god of Sanity and Mental Fortitude, who is also the god of secrets. A god who allegedly knows all secrets in shape and form and who actively wants to share this information, but who also know that mortals have to earn their knowledge or risk being overwhelmed (at least according to its scripture and priesthood). This is a god who seems to want the best for mortals, but somehow ends up being the one who takes the most indirect of approaches. Paradoxically it is exceedingly rare for any piece of information to be traced back to this god, but at the same time people keep attributing new breakthroughs and the uncovering of ancient secrets to this god, even if no connection can be made.
In short a god who tries to prepare mortals for the truths of the universe while maintaining their personal and cultural sanity. Ultimately a god of progression, who allegedly already knows the road. Secondarily a god of meditation and personal strength, who promotes the idea of a clear and sound mind and who scorns any and all forms of intoxication.
The image of the god would be a hooded figure clasping a huge tome while holding a key towards the viewer in an outstretched hand.
Its priesthood would consist of librarians and scholars. Followers would be patrons of the arts and the like, any people who seek to promote enlightenment and truth-seeking in an ordered manner.