These are the contexts of the quotes tweeted from @sueannbowling between September 19 and September 25, 2013. All but the last are from ‘Ware Hawk, by Andre Norton.
“I do not know what may threaten, only this is a dangerous land.” Tirtha to the Falconer, stressing that she needs him to give help willingly.
“Night was when the Dark held its greatest power.” The group is reluctant to trail the Dark ones by night.
“What strength one has must be saved for a time when it is most needed.” Alon, recognizing that he must save his strength for the actual confrontation with the Dark.
“Upon each other they must depend until the very end.” Tirtha recognizes that she, the Falconer and Alon are now bound together in her quest.
“The Power had always been a danger for those who could summon it even lightly.” Power corrupts, and Tirtha is wondering just why Yachne valued Alon, though she did not seem to love him.
“What’s the disaster this time?” Tourist Trap, by Sue Ann Bowling. Marna to the planetary administrator Anden, when he accosts her with news of another problem. Luckily this time it’s a solution, though Anden does not recognize it as such.