If the English can survive their food, they can survive anything.

This quote is a humorous way of criticizing English cuisine, which has traditionally been viewed as bland and unappetizing compared to other cultures. The underlying message, however, is one of resilience. Shaw suggests that if the English people can endure their own food, they can withstand any hardship or adversity that comes their way.

This idea of resilience could be applied in our world today or personal development in several ways. In the face of global crises such as climate change or a pandemic, societies must display endurance and adaptability to survive and thrive. On an individual level too, one might encounter various challenges in life – from personal loss to career setbacks. Just like enduring unpalatable food for sustenance, these hardships need to be faced head-on with strength and determination.

Moreover, it could also imply adaptation and making the best out of what you have at your disposal – another important trait for survival both on a societal level (such as resource management) and personal level (like managing personal finances or resources).

The quote also subtly highlights cultural diversity – different cultures have different tastes which may seem strange to others but are normal within those cultures themselves. This perspective is particularly relevant today with increased global interconnectivity where understanding and respecting cultural differences becomes crucial.

In essence, this quote uses humor to deliver a profound message about human resilience against adversity while also hinting at broader themes such as cultural diversity and adaptability.