Each plan is, at best, an informed guess about what might happen in the future, based on extrapolation from the known past.

However, the past is not always a good indicator of the future. The world is full of uncertainty. So, suggests Morgan Housel in her new book, Same as Ever: A Guide to What Never Changes, instead of trying to predict the future based on what happened in the past, we should pay attention to the things that never change. This can help you better understand important events and their impact on what is happening.