A street thug and a paid killer are professionals - beasts of prey, if you will, who have dissociated themselves from the rest of humanity and can now see human beings in the same way that trout fishermen see trout.
“I believe that a scientist looking at nonscientific problems is just as dumb as the next guy.”
“The lecturer should give the audience full reason to believe that all his powers have been exerted for their pleasure and instruction.”