Either way, I first saw Hillary use it many years ago and she attributed it to her father. Don't know who it actually came from first, but, I really like Hillary's fathers version. The version attributed to JM Barry. It's a great quote. ;)
Message in reply to: This is who Anderson Cooper was quoting:
Karin, it cracked me up, Anderson Cooper just quoted you: Be kinder than necessary, for everyone you meet is fighting some kind of battle. Good reminder for all.