Carl Sagan WAS strictly scientific.
He was also poetic. From cosmos (1980): "The Cosmos is all that is or ever was or ever will be. Our feeblest contemplations of the Cosmos stir us — there is a tingling in the spine, a catch in the voice, a faint sensation as if a distant memory, of falling from a height. We know we are approaching the greatest of mysteries."
and
"We are like butterflies who flutter for a day and think it's forever."