How many times have we said, “if I knew then what I know now“, “If I Knew Then” is a 1939 song written by Dick Jurgens and Eddy Howard. “Hindsight is 20/20 is another favorite saying! So, why all this about being 21? It is because my Grandson is 21 today! I can remember being 21, I can remember his mother at 21! And it seems like yesterday, only I’m 67 and my daughter is 45! All this made a song come to my mind by Harry Chapin! What does 21 remind you of?