1. "But you see, Meg, just because we don't understand doesn't mean that the explanation doesn't exist" (p. 46).
Meg's mother, in answer to Meg's question about whether things always have an explanation.
2. "Nothing is hopeless; we must hope for everything" (p. 61).
Mrs. Who, quoting Euripides.
3. "[A] straight line is not the shortest distance between two points" (p. 78).
Mrs. Whatsit explaining the concept of the tesseract.
4. "Suddenly there was a great burst of light through the Darkness. The light spread out and where it touched the Darkness the Darkness disappeared. The light spread until the patch of Dark Thing had vanished, and there was only a gentle shining, and through the shining came the stars, clear and pure" (pp. 91-92).
A glimpse of the cosmic battle between light and darkness, and the triumph of light.
5. "As the skipping rope hit the pavement, so did the ball. As the rope curved over the head of the jumping child, the child with the ball caught the ball. Down came the ropes. Down came the balls. Over and over again. Up. Down. All in rhythm. All identical. Like the houses. Like the paths. Like the flowers" (p. 103).
Life on Camazotz.
6. "Like and equal are not the same thing at all!" (p. 160)
Meg tries to refute Charles's claim that equality means that everyone is alike.
7. "'We do not know what things look like, as you say,' the beast said. 'We know what things are like'" (p. 181).
Aunt Beast explains to Meg how the beasts perceive things.
8. "It seemed to travel with her, to sweep her aloft in the power of song, so that she was moving in glory among the stars, and for a moment she, too, felt that the words Darkness and Light had no meaning, and only this melody was real" (p. 185).
Meg's experience of Aunt Beast's singing.
9. "You're given the form, but you have to write the sonnet yourself. What you say is completely up to you" (p. 199).
Mrs. Whatsit comparing human life to a sonnet.
10. "Love. That was what she had that IT did not have" (p. 207).
The realization that enables Meg to rescue Charles Wallace.