Related:

• Once harm has been done, even a fool understands it. -- Home
• The plow has probably done more harm--in the long run--than the sword. -- Edward Abbey
• It has been said that there is no fool like an old fool, except a young fool.
  But the young fool has got to grow up to be an old fool, before he can realize what a damn fool he was when he was a young fool....
• So, once again, I've been had. But an even more interesting story has developed high atop this two-story school -- a love story.
  -- Kent Brockman, "Grade School Confidential...
• Half of the harm that is done in this world is due to people who want to feel important.
  They don't mean to do harm but the harm does not interest them. -- T. S. Elio...
• What has been is what will be, and what has been done is what will be done
  and there is nothing new under the sun. -- Ecclesiastes 1:9...
• Skinner walks in, sees Homer] Skinner: What's _he_ doing here?
  Bart: Well once he found out we were going to get Ned Flanders fired, he _insisted_ on helping....
• ... but what has been said once can always be repeated. -- Zeno of Elia
• Most bugs surface once a program has been delivered.