Those who suffer from an exaggerated sense of their own ability and accomplishment are continually subject to frustration, disappointment, and rage when reality intrudes and the world doesn't validate their idealized view of themselves.
Peace comes from within. Do not seek it without. It can be argued that peace and happiness comes from the subjective internalised perspective of realizing things could be worse and being grateful they aren't. The alternative view that peace and happiness comes from the objective external perspective of having more and better things than at present, while important for growth, can be a never-ending source of jealousy, dissatisfaction and disappointment. A balance of the two, where people are grateful for what they have while striving for more seems the best blended perspective.
Every American bride is taken there [Niagara Falls], and the sight of the stupendous waterfall must be one of the earliest, if not the keenest, disappointments in American married life.
The compensations of calamity are made apparent to the understanding also, after long intervals of time. A fever, a mutilation, a cruel disappointment, a loss of wealth, a loss of friends, seems at the moment unpaid loss, and unpayable. But the sure years reveal the deep remedial force that underlies all facts.
Going after a dream has a price. It may mean abandoning our habits, it may make us go through hardships, or it may lead us to disappointment, et cetera. But however costly it may be, it is never as high as the price paid by people who didn't live. Because one day they will look back and hear their own heart say: 'I wasted my life.'
When people look back at their childhood or youth, their wistfulness comes from the memory, not of what their lives had been in those years, but of what life had then promised to be. The expectation of some indefinable splendor, of the unusual, the exciting, the great is an attribute of youth and the process of aging is the process of that expectations' gradual extinction. One does not have to let it happen. But that fire dies for lack of fuel, under the gray weight of disappointments.
Hope is a decision we make, a choice to believe that God can take the adversity, the disappointment, the heartache, and the pain of our journeys and use these to accomplish his purposes.
If two men who were friends in their youth meet again when they are old, after being separated for a life-time, the chief feeling they will have at the sight of each other will be one of complete disappointment at life as a whole; because their thoughts will be carried back to that earlier time when life seemed so fair as it lay spread out before them in the rosy light of dawn, promised so much — and then performed so little.