"People should think things out fresh and not just accept conventional terms and the conventional way of doing things."
- R. Buckminster Fuller

"You are as young as your faith, as old as your doubt; as young as your self-confidence, as old as your fear; as young as your hope, as old as your despair."
- Douglas MacArthur

"Youth cannot know how age thinks and feels. But old men are guilty if they forget what it was to be young."
- J. K. Rowling, Harry Potter and the Order of the Phoenix

"[D]on't grow old. With age comes caution, which is another name for cowardice.... Whatever else you do in life, don't cultivate a conscience. Without a conscience a man may never be said to grow old. This is an age of very old men."
- Herbert Beerbohm Tree

"Don't you understand that we need to be childish in order to understand? Only a child sees things with perfect clarity, because it hasn't developed all those filters which prevent us from seeing things that we don't expect to see."
- Douglas Adams

"Youth is a circumstance you can't do anything about. The trick is to grow up without getting old."
- Frank Lloyd Wright

Look for posts on Sunday, Monday and Tuesday at:
http://lessonsproject.tumblr.com/ (Link).