Imagination is more important than knowledge.
CAVEMAN #2 (you met him in the last chapter) is standing on a cliff at the edge of a deep canyon.
He sees the birds soaring overhead, and, like people of all epochs, he imagines what it would be like to glide through the sky like a bird. He is able, thanks to his recently evolved prefrontal cortex, to envision himself soaring above the canyon.
He can actually “see” the canyon from an aerial view in his mind's eye even ...