In the meantime, I figured I'd post a thought I had the other day:
There are a number of things that escape our conscious thoughts:
-Our perception of the world.
-Our own minds: i.e. Decision-making.
-Even our own desires.
Our conscious logical thoughts are mostly based upon observations of the physical world.
So this seems intuitive to me: for our conscious minds to have a complete understanding of the world, we need some metaphysical theory. Karma, God, Buddha, 'Good.'
To account for things that our conscious minds cannot detect, describe or decipher.