First of all, what this movie wants to express is how you would spend your life if you were given another chance. This is similar to the line "If God gives me another chance" in A Chinese Odyssey. Although we all know that there is no regret medicine in life, if you are given a chance to start over, will you be the same as before?
Secondly, the importance of choice to life. In his first life, Benjamin made many choices, some of which were right and some were wrong. And some choices that seemed right at that time now seem to be wrong. So in his second spring, Benjamin made many incredible choices, such as leaving his wife and daughter, such as refusing Daisy's courtship.
Finally, what is the real meaning of life in this movie? Wealth or power? Actually, it's not. The greatest meaning of life is that you can feel your existence and your inner thoughts all the time. Only in this way will life be glad of your arrival.