Some people are always complaining about their disabilities. But that doesn’t lead you very far. If, once, you have truly seen your weaknesses and truly, sincerely understood, seen that you must not be like that—that’s the end of complaining. Then there is the daily effort, the building up of the will, the vigilance of every moment—you must never allow a recognised mistake to renew itself. To err through ignorance, to err through unconsciousness, is obviously very unfortunate, but it can be put right. Whereas to go on making the same mistake, knowing that it must not be made, is an act of cowardice which we must not permit ourselves.
Ref : On Thoughts and Aphorisms