These are the contexts of the quotes tweeted between May 9 and May 15.
“I know it is not the truth, and I say so.” The Dolphins of Pern, by Anne McCaffrey. Master Fandarel is contradicting rumors he knows are not true, that the dragonleaders are dragging their heels about settling the Southern Continent.
“We intend to talk to you or at you or at you, but you would be wise to pay attention.” The Dolphins of Pern, by Anne McCaffrey. Larad, speaking for the Lords when they confront Toric.
“I sing the songs of old so that the young do not forget the past.” The Dolphins of Pern, by Anne McCaffrey. The Tillek (Head of the dolphins) in response to Seball (Masterharper) saying she has much the same position as he has.
“When your Master calls, you go.” The Dolphins of Pern, by Anne McCaffrey. Readis’s new master and teacher is the Tillek, and she has just called him to join her.
“Stars did not change their courses.” The Skies of Pern, by Anne McCaffrey. Shankolin, one of the conspirators against AIVAS, rehearsing to himself what his father taught him.
“He had a duty to perform, a wrong to right, and a theory he must confirm or forget. The Skies of Pern, by Anne McCaffrey Shankolin again, justifying the terrorism he is planning.
“Maybe I can do something about it when I’m older, but not alone. Tourist Trap, Sue Ann Bowling. Roi dislikes more than one thing about the Confederation, but he knows no one will listen to someone as young as he is.