Why the most beautiful part of biology is also the most complex?

One hour of sleep or ten hours, right-handed or left-handed, is this blue or red?

The human brain knows what it’s doing, but who taught it to know everything?

The human brain has a purpose for all its actions. How does the human brain define a goal? Is it a synapse, an algorithm in a dendrite, or an electric force? 

Is time just a number for the human brain, or is memory just an electrical signal that interprets it? Or are its dimensions much larger than these words?

How does the human brain summarize big concepts like God and love in small brain circuits?