Failure is just another name for much of real life: much of what we set out to accomplish ends in failure, at least in our own eyes. Who set the bar so high that most of our attempts to sail gracefully over it on the viewless wings of Poesy end in an undignified scramble or a nasty fall into the mud? Who told us we had to succeed at any cost?
Get back on the horse that threw you, as they used to say. They also used to say: you learn as much from failure as you learn from success.