It’s not good to make sentimental journeys. You see the differences instead of the sameness.
Meaning of the quote
The quote suggests that it's better not to revisit places from your past with emotional nostalgia. When you go back, you'll notice how things have changed instead of focusing on the things that remain the same. It's easy to get caught up in feelings of the past, but that can make you miss the present.
About Mary Astor
Mary Astor was a renowned American actress who had a long and successful career in film, television, and stage. Despite facing personal scandals, she went on to win an Academy Award for Best Supporting Actress and was widely acclaimed for her depth and reality in the roles she played.