“You can’t plan life; life has other plans,” is a popular expression, often attributed to John Lennon, but originally from an Allen Saunders 1957 Reader’s Digest article.
It emphasizes the unpredictable nature of life and the need to be adaptable. Life changes in a second. We don’t know what will happen tomorrow. So no matter what happens, hopefully we will be able to handle unexpected situations and move on with life.