Expectation Quotes - page 12
A distinguished writer (Siméon Denis Poisson) has thus stated the fundamental definitions of the science:
:"The probability of an event is the reason we have to believe that it has taken place, or that it will take place."
:"The measure of the probability of an event is the ratio of the number of cases favourable to that event, to the total number of cases favourable or contrary, and all equally possible" (equally like to happen).
From these definitions it follows that the word probability, in its mathematical acceptation, has reference to the state of our knowledge of the circumstances under which an event may happen or fail. With the degree of information which we possess concerning the circumstances of an event, the reason we have to think that it will occur, or, to use a single term, our expectation of it, will vary.
George Boole
Hope is necessary in every condition. The miseries of poverty, of sickness, or captivity, would, without this comfort, be insupportable; nor does it appear that the happiest lot of terrestrial existence can set us above the want of this general blessing; or that life, when the gifts of nature and of fortune are accumulated upon it, would not still be wretched, were it not elevated and delighted by the expectation of some new possession, of some enjoyment yet behind, by which the wish shall at last be satisfied, and the heart filled up to its utmost extent.
Samuel Johnson