Here are the contexts of the quotes tweeted from @sueannbowling between August 1 and August 7, 2013. All but the last are from The Skies of Pern, by Anne McCaffrey.
“We will try to defuse rumor with fact.” Sebol, faced with trying to explain the tsunami.
“Since when has the middle of the night been free of trouble!” Idolaran, when the group sent to warn Toric is challenged.
“We did what we could.” F’lessan to Tai, as both are exhausted after rescuing people from the tsunami.
“You couldn’t sell something that had been in the family so long.” The thoughts of Chesmic, stationmaster at Circle Runner Station, about the meteor that had produced the circular crater for which the station was named.
“Too hidebound to know the color of her pelt.” Pinch’s opinion of the woman Abominator called “Fourth.”
“We all have a choice.” A bit of Pinch’s philosophy.
“Maybe they couldn’t compete with the peccaries.” Tourist Trap, by Sue Ann Bowling. Penny, when Roi wonders why there are no black bears on Falaron. (The peccaries are flat-headed peccaries, extinct on Earth, but filling the same niche as black bears on our planet during the Pleistocene.)