I don't yet know, but am satisfied with that.
I feel no need to say I don't know, therefore "Giant Invisible Bearded Guy".
How do you explain human nature?
As a complex accumulation of naturally selected behavioral traits.
What happens to a person at death?
They become food for microorganisms.
How do you determine right and wrong?
By appealing to a rationally derived and objective moral code.
How do you know that you know?
By testing what I think I know, against the confines of reality.
LOL