It is not intuitively obvious that in the vast distances of space
the shortest distances between two far away objects, planets
perhaps or stars like our sun, is a curved path, not a straight 
line, as Euclid, the brilliant Greek mathematician, believed.

It is not intuitively obvious that the qualities of the animals on 
Earth, including particularly those in the genus Homo sapiens, 
came to be as they are through an unimaginably lengthy 
period during which many, many variations failed to procreate.

You cannot imagine, in the usual sense of imagine, a speed
of 186,00 miles per second, or the fact (apparently) the events
seen in (if in is the right word) a distant constellation 
actually occurred far, far earlier, not as we see it. 

It is not intuitively obvious, at least not without reflection,
that your behavior and mine differ largely because the chain
of events, beginning with conception, are like a million little 
billiard balls striking together in many different directions

So that we are not reacting just to the present events
but to what happened in each of the many thousands
of events that we have witnessed, that have in some way
impinged on us, over the thousands of hours in our past 

Then there are those miniscule things called genes that remain 
a mystery to our unchemical ways of thinking, that might 
render us blind or crippled and that, at the very least help sculpt
what we think of as our character and personality

How mysterious and how impossibly vast and complex is the 
universe, but even more extraordinary, perhaps, is how much
the three-pound human brain has discovered about all this
through the hits and misses of a few million years.