Great passages from Dao De Jing: "Failure is an opportunity"

Chapter seventy-nine of the Dao De Jing summarizes the lack of responsibility shown when pride deters a person from learning from mistakes.  
Failure is an opportunity.
If you blame someone else,
there is no end to the blame.
Therefore the Master
fulfills her own obligations
and corrects her own mistakes.
She does what she needs to do
and demands nothing of others.