That’s a really great question. I wouldn’t say that “totally comprehensible” would be the goal. I would say that “comprehensible enough” would be the goal. To be accessible, across time, cultures, languages, differing intellects, learning styles, modes of processing, would be the goal.
Billions of people have found this to be the case. There is no skywriting, saying “It’s me, God, and I’m here…” But if there were, skeptics would not believe anyhow.
Faith is a step taken in an uncertain direction. The step is rewarded after it is taken. Knock and I shall open, seek and you will find. This is true.