Truth in the human world, is constructed, defined and then reconstructed by the human self.
Certainly the first true humans were unique by virtue of their large brains. It was because the human brain is so large when compared with that of a chimpanzee that paleontologists for years hunted for a half-ape, half-human skeleton that would provide a fossil link between the human and the ape.
When I look at the human brain I'm still in awe of it.
The human brain is an incredible pattern-matching machine.
Most of our brain cells are glial cells, once thought to be mere support cells, but now understood as having a critical role in brain function. Glial cells in the human brain are markedly different from glial cells in other brains, suggesting that they may be important in the evolution of brain function.
The human brain has evolved the capacity to impose a narrative, complete with chronology and cause-and-effect logic, on whatever it encounters, no matter how apparently random.
With its billions of interconnected neurons, whose interactions change from millisecond to millisecond, the human brain is an archetypal complex system.
The human brain is built to compare; it's Darwinian to consider an alternative when one presents itself.
The human brain is a product of natural selection. In the face of scarcity, our hominid great-great-uncles were unable to compete against our sapient great-great-grandparents' abilities to build more elaborate mental models and orchestrate their bodies' movements in more sophisticated ways.
Everything we do, every thought we've ever had, is produced by the human brain. But exactly how it operates remains one of the biggest unsolved mysteries, and it seems the more we probe its secrets, the more surprises we find.
After all my probing into the human brain, I should still be aware of mysteries and come up with them myself.