“Pessimism: A valuable protection against quackery.”

“C++ protects against accident, not against fraud.”

“They are like me, I tell myself. And in that way I protect myself against them. And in that way I protect myself against myself.”

“Neither the Army nor the Navy is of any protection, or very little protection, against aerial raids.”

“There are several good protections against temptations, but the surest is cowardice.”

“It's impossible to protect your kids against disappointment in life.”

“There are some weapons you can't protect yourself against.”

“The protection he relied on for nearly thirty years was based on just two things. The same two things anybody uses to protect against any danger. The same way a nation protects itself against an enemy missile, the same way an apartment dweller protects himself against a burglar, the same way a boxer guards against a knockout blow. Detection and response. Stage one, stage two. First you spot the threat coming in, and then you react to it.”

“One of the best protections against disappointment is to have a lot going on.”

“For nearly three quarters of a century, Jim Crow imposed on free Negroes a regime in many respects harsher than slavery. The persons of slaves received a certain protection from the fact that they were valuable property, a protection that was stripped from them after they were free.”