Customs, morals--is there a difference?

“Courage is the complement of fear. A man who is fearless cannot be courageous. …”

“Dad claims that library science is the foundation of all sciences just as math …”

“Civilians are like beans; you buy 'em as needed for any job which merely requir…”

“But, do you know, once you get used to it's rather cute. I mean, if a girl look…”