The purpose of metaphor
Speaking about the Absolute is already formulating that which cannot be given form. The more concepts we include, the further away from Truth we stray.
An assumption behind every question is the existence of a mind asking it. Since thoughts can have innumerable forms (as proven by the 7 billion minds and the 6500 languages spoken), a satisfying answer is like a key that fits perfectly into the keyhole that asks it, so that both can dissolve in the inherent emptiness of our Being.
The key cannot be too long or too short, cannot have the slightest defect, or the question would remain.
A metaphor, then, in order to be relevant for many minds, has to stay as close to Truth as possible, and should barely begin to touch the world of mind, or concepts.