Sidney Homan defines a pivotal line as "a moment in the script that serves as a pathway into the larger play ... a magnet to which the rest of the play, scenes before and after, adheres." He offers his personal choices of such lines in five plays by Shakespeare and works by Beckett, Brecht, Pinter, Shepard, and Stoppard. Drawing on his own experience in the theatre as actor and director and on campus as a teacher and scholar, he pairs a Shakespearean...