What is it the author of In The Shadow of the Glen wants you to take away from this quirky play?
I can't speak for the author, so writing about what Synge "wants you to take away" from In the Shadow of the Glen is probably beyond me, but I can tell you about the themes revealed in the play.
According to the site I'll list below, here on enotes, several themes are present:
- The basic human need for security and the basic human need for freedom. Nora marries for security, but her marriage brings her only loneliness and misery. In the end, she--the only really likable and well-developed character in the play--chooses the life of the tramp over life with her husband.
- Feminism. Nora is trapped, and miserable. Again, she chooses freedom. Neither of her choices is a good one, but the less lousy one is life with the tramp.
- Loneliness. She learns from her husband that one can be with a person and still be lonely, while she learns from the tramp that one can be alone, but not be lonely.
The play only appears to be simple, but the above should help you understand what ideas the play reveals.