Here is a summary of some of the critical opinions of Glass:
Positive reviews:
* Harold Clurman, in The Nation: "Glass is a work of poetic beauty, a delicate tracery of emotions and relationships."
* Richard Watts Jr., in The New York Post: "Glass is a beautiful and moving play, written with insight and compassion."
* Brooks Atkinson, in The New York Times: "Glass is a work of art, a sensitive and poetic exploration of the human condition."
Negative reviews:
* John Simon, in The Hudson Review: "Glass is a pretentious and empty work, full of sound and fury signifying nothing."
* Robert Brustein, in The New Republic: "Glass is a tedious and self-indulgent play that lacks any real dramatic tension."
* Kenneth Tynan, in The Observer: "Glass is a minor work by Williams, lacking the power and passion of his earlier plays."
Overall, critics have been divided in their opinions of Glass. Some have praised its beauty and artistry, while others have found it lacking in substance and dramatic tension.