There IS another option: an impersonal God, and "truth" would be that which must always be present and never changes. An impersonal God would be within everything and everyone so that anyone could know its presence within themselves. Being impersonal and ever present it wouldn't require worship, obedience, praise, ritual, prayer, supplication to be known, and wouldn't care one bit whether anyone believe in it or not. All of those things are characteristic of a personal God, a God created in the image of man.
An impersonal God wouldn't "dictate" its thoughts to others to be turned into "holy" books which in turn would end up separating people from one another because of different beliefs about God, but would simply be present in a way that was undeniable if one was attuned to where and how to look for it. Knowing an impersonal God would reveal the unity of all existence rather than emphasize the differences among humanity. So "truth" would be that which is within YOU that is alive and ever present, and if it was discovered it would change how one viewed oneself as well as the world. It would be the healing agent of what is viewed in separation by the human mind because it would reveal the inherent unity of all existence.