The Past and Everlasting Regret

Something about summer and my driving need to accomplish a million things has me thinking of a line from a Tennessee Williams play today. In The Glass Menagerie, fading southern belle Amanda Wingfield tries to give her son a sense of urgency with this line: "You are the only young man that I know of who ignores the fact that the future becomes the present, the present becomes the past, and the past turns into everlasting regret if you don't plan for it!"