What Philosphy and Nutrition lesson can you get by travelling like this?

This is how my father used to travel when he was a young person in India :) It does not seem seem relaxing at all!

But how could he have gotten a philosophy lesson from this situation. What lesson can that be? I have listened to it million times in the last few years.

Can you guess? Be creative. I will tell you the answer after my school exams. Hint, its in my book.