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.
There is only one inborn erroneous notion ... that we exist in order to be happy ... So long as we persist in this inborn error ... the world seems to us full of contradictions. For at every step, in great things and small, we are bound to experience that the world and life are certainly not arranged for the purpose of maintaining a happy existence ... hence the countenances of almost all elderly persons wear the expression of ... disappointment.
Expect nothing, live frugally on surprise. Become a stranger to need of pity. Or if compassion be freely given out, take only enough. Stop short of the urge to plead, then purge away the need. Wish for nothing larger than your own small heart or greater than a star. Tame wild disappointment with caress, unmoved and cold. Make of it a parka for your soul. Discover the reason why so tiny human midget exists at all, so scared and so unwise. But expect nothing, live frugally on surprise.
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.
I don't think actors should ever expect to get a role, because the disappointment is too great. You've got to think of things as an opportunity. An audition's an opportunity to have an audience.