Never allow sleep to close your eyelids, after you went to bed,
Until you have examined all your actions of the day by your reason.
In what have I done wrong? What have I done? What have I omitted that I ought to have done?
If in this examination you find that you have done wrong, reprove yourself severely for it;
And if you have done any good, rejoice.
The Golden Verses of Pythagoras (somewhere between 3 BCE - 5 CE)