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.
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.
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.
Upon the whole, therefore, she found, what has been sometimes found before, that an event to which she had looked forward with impatient desire, did not in taking place, bring all the satisfaction she had promised herself. It was consequently necessary to name some other period for the commencement of actual felicity; to have some other point on which her wishes and hopes might be fixed, and by again enjoying the pleasure of anticipation, console herself for the present, and prepare for another disappointment.
... when the struggle seems to be drifting definitely towards a world social democracy, there may still be very great delays and disappointments before it becomes an efficient and beneficent world system. Countless people ... will hate the New World Order and will die protesting against it. When we attempt to evaluate its promise, we have to bear in mind the distress of a generation or so of malcontents, many of them quite gallant and graceful-looking people.
In the intricate paths of life when difficulties and hardships confront a man, and the darkness of difficulty and suffering becomes long, it is patience only that acts like a light for a Muslim, that keeps him safe from wandering here and there, and saves him from the muddy marsh of disappointment, desperation and frustration.