“The strangest and hardest kind of time travel is the unaided kind.”

“Everyone has a time machine. Everyone *is* a time machine. It's just that most people's time machines are broken. The strangest and hardest kind of time travel is the unaided kind. People get stuck, people get looped. People get trapped. But we are all time machines.”

“The hardest learned lesson: that people have only their kind of love to give, not our kind.”

“The strangest kind of curse had been laid upon him: knowledge without hope of evidence.”

“There are two kinds of travelers. There is the kind who goes to see what there is to see, and the kind who has an image in his head and goes out to accomplish it. The first visitor has an easier time, but I think the second visitor sees more.”

“It's important for survival that children have their own experiences, the kind they learn from. The kind their parents arrange for are not as useful. Good parents are the hardest to get rid of.”