Related:

• When you are thirsty, it is too late to think about digging a well. Japanese Proverb
• I have a suspicion, but it's too horrible to think about. Doctor, State of Decay
• It's never too late to have a happy childhood.
• If you have to think twice about it, you're wrong.
• It is never too late to be what you might have been. -- Farmer's Almanac, 1995
• Aphorism, n.: A concise, clever statement. Afterism, n.
  A concise, clever statement you don't think of until too late. -- James Alexander Thom...