But much less often spoken about is the evolution of our interiors -- of our subjective experience of consciousness and our shared cultural values, morals and beliefs.
Bludgeoning his audience less than usual, Mr Brown spoke about what motivated him in politics: the unswerving moral compass bequeathed him by his parents.
The less you speak about the relationship or the breakup, the less you will have to bear condescending conversations.
During his inaugural news conference, he spent much less time speaking about financial policy than speaking about how he would strengthen Japanese democracy by bringing the ministry to heel.
During Blackadder Rides Again, Tony Robinson likewise recalls that these script meetings could be uncomfortable, and has been less reserved speaking about the script rehearsals since.
While Doutzen was highlighted as a healthy model once described as "curvy" (at a size six, no less), Arianna spoke about her own daughter's eating disorder and the steps she's taken, privately and professionally, to combat the negative body talk that inspires such disorders.
What is spoken about a lot less is the other side of this equation: what additional revenue opportunities are available to public bodies using their current assets?
At a time when 50 million Americans live below the poverty line, a 2012 Georgetown University C.A.R.A. study found that President Obama has spoken about the poor less than any president since JFK.
But he did less quipping, speaking instead about more substantive matters, like the history of the Tchaikovsky Violin Concerto, or Glazunov's place in the pantheon of late-19th- and early-20th-century composers (second level but not to be dismissed lightly).
These banal, commonplace words might well have been spoken about George W. Bush when he was president, and could, though with somewhat less likelihood, be spoken today about President Barack Obama.
