People
One of the greatest pains to human nature is the pain of a new idea.
— Walter Bagehot

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
A new idea is described as painful rather than simply exciting. That choice suggests how deeply fresh thinking can disturb what feels familiar. The sentence makes resistance understandable as an experience of discomfort, while leaving open what a person might do with that discomfort.
Context reviewed