Having once decided to achieve a certain task, achieve it at all costs of tedium and distaste. The gain in self confidence of having accomplished a tiresome labor is immense.
Almost all human affairs are tedious. Everything is too long. Visits, dinners, concerts, plays, speeches, pleadings, essays, sermons, are too long. Pleasure and business labor equally under this defect, or, as I should rather say, this fatal super-abundance.
When we consider the incidents of former days, and perceive, while reviewing the long line of causes, how the most important events of our lives originated in the most trifling circumstances; how the beginning of our greatest happiness or greatest misery is to be attributed to a delay, to an accident, to a mistake; we learn a lesson of profound humility.
Be cheerful [and grateful for the good that you have]: do not brood over fond hopes unrealized until a chain is fastened on each thought and wound around the heart. Nature intended you to be the fountain-spring of cheerfulness and social life, and not the mountain of despair and melancholy.