Moral: Make safe mistakes on purpose I learn things the slow
  way. I like sticking myself into things because it makes me care
  about them. I constructed my own name very slowly. Then I tried
  to run my name. It didn't work. I love seeing an error like
  this: "I made a style error". Yes, I wore sandles with socks
  once. "Kenneth is an undefined function". Yes, I don't don't
  what the heck my function is on this planet. "Udut is an
  undefined variable" - Yes, the actions of my family are very
  variable and quite undefined. I did learn that #LISP expected:
  a) KENNETH to be a function b) UDUT to be a variable. That
  teaches me something. I'm trying to teach it me, and it's trying
  to teach me it.? [1]i-learn-lisp-the-slow-way

References

  Visible links
  1. http://icopiedyou.com/wp-content/uploads/2015/07/i-learn-lisp-the-slow-way.jpg