Thou shalt not be perfect

Adding on to the last post on "Mistakes as opportunities", I thought this was very appropriate. I was unable to find a source -- I think it is one of those things that has just continued to be passed on and on, but if anyone knows otherwise I would be grateful if you let me know.

Thou shalt not be perfect nor even try to be.
Thou shalt not try to be all things to all people.
Thou shalt leave things undone that ought to be done.
Thou shalt not spread thyself too thin.

Thou shalt learn to say "NO".
Thou shalt schedule time for thyself, 
                       and thy supportive network.
Thou shalt switch off, and do nothing regularly.

Thou shalt be boring,untidy,inelegant 
                       and unattractive at times.
Thou shalt not even feel guilty!
Especially thou shalt not be thy own worst enemy,
                      but be thy best friend.

30/3/15 Addendum
A good friend has provided me with more information. Apparently these were written by Hilary Langford, who is a management consultant and has a website: www.hilary.com.au 

Amanda Gore has provided an expanded version on her blog: http://amandagore.com/10-commandments-for-reducing-stress/