A sensible person generally refrains from embarking on an endeavor that is doomed to fail. If he insists on going ahead with his endeavor, he will be forced to recognize his error.
आम तौर पर एक समझदार इंसान जब देखता है कि फलाँ काम करने से नाकामी ही मिलेगी, तो वह उस काम को हाथ में लेगा ही नहीं ।