Willpower should be understood to be the strength of the mind, which makes it capable of meeting success or failure with equanimity. It is not synonymous with certain success. Why should one's attempts always be attended by success? Success breeds arrogance and man's spiritual progress is thus arrested. Failure, on the other hand, is beneficial, inasmuch as it opens his eyes to his limitations and prepares him to surrender himself. Self surrender is synonymous with eternal happiness.
Ramana MaharshiNearly all mankind is more or less unhappy because nearly all do not know the true Self. Real happiness abides in Self-knowledge alone. All else is fleeting. To know one's Self is to be blissful always.
Ramana Maharshi