[...] Calculus was realizing that something you had previously understood to be true in only a silly, facile way really had deep roots furled out underneath it that proved its worth and fireworks that shot up out of it too, newer and more complicated and more beautiful than what you had known before. And the roots and the fireworks talked to one another across the night air in a lyrical, sensible language. And assuming you did things as they were meant to be done, everything worked out perfectly. [...]