The reality principle means to find "ways to gratify the id that the outside world will find acceptable." The reality principle is part of Freud's personality theory.
When I read about the reality principle in our textbook, I had to think about a German saying. It is not directly related to Freud's theory of personality. However, it has a lot to do with reality:
Das Leben ist kein Ponyhof!
Directly translated it would mean something like: Life is not a pony farm.
English sayings related to the German one would be:
Life wasn't meant to be easy.
Life's not a
bed of roses.
Life's no walk in the park.
Life's no bowl of cherries.
I really had to laugh, when I found this sign: It crosses out the "Real World" and the Pony farm will be there in two kilometers.
Sometimes I just wish to leave the real world, especially when there are exams, and just spend my life on the "Ponyhof"!