People
The bird that would soar above the level plain of tradition and prejudice must have strong wings.
— Kate Chopin ‧ The Awakening

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
To rise above the flat expanse of custom and narrow judgment, you need real strength, this says. It compares a person wanting to break from convention to a bird: the flight above the ordinary plain demands sturdy wings, not just wishing.
Context reviewed