" Things rust, you know, like the heart. My cardiologist said, ‘It’s a pump; use it – that’s the sole advice I’ve got to give you.’ It’s the same in playwriting. Don’t theorise about it. Do it. "
- Peter Shaffer

In the given quote, Peter Shaffer discusses how things can deteriorate over time if they are unused or neglected, drawing a parallel between physical objects and human emotions. He mentions his cardiologist’s advice to keep one's heart healthy by using it regularly, as inactivity can cause both mechanical devices and organs like hearts to "rust" or become less effective.

Shaffer then extends this metaphor beyond the realm of physical health to creative endeavors such as playwriting. By saying not to theorize about writing but rather to do it, he emphasizes that creativity also requires consistent practice and application to remain vibrant and productive. This notion suggests that both physical well-being and artistic expression thrive when they are actively engaged with and utilized regularly.

Peter Shaffer is a renowned British playwright and screenwriter, celebrated for his work in the theater and film industries. His most famous plays include "Amadeus" and "Equus," which have been widely acclaimed for their psychological depth and dramatic intensity. Through his rich literary contributions, Shaffer has earned international recognition and continues to influence contemporary theatre with his unique insights into human nature and creativity.