and Horace advises his poetical friend to consider every day as the last which he shall enjoy, because that will always give pleasure which we receive beyond our hopes. If we alarm ourselves beforehand with more difficulties than we really find, we shall be animated by unexpected facility with double spirit; and if we find our cautions and fears justified by the consequence, there will however happen nothing against which provision has not been made, no sudden shock will be received, nor will the main scheme be disconcerted.
There is, indeed, some danger lest he that too scrupulously balances probabilities, and too perspicaciously foresees obstacles, should remain always in a state of inaction, without venturing upon attempts on which he may perhaps spend his labour without advantage. But previous despondence is not the fault of those for whom this essay is designed; they who require to be warned against precipitation, will not suffer more fear to intrude into their contemplations than is necessary to allay the effervescence of an agitated fancy. As Des Cartes has kindly shewn how a man may prove to himself his own existence, if once he can be prevailed upon to question it, so the ardent and adventurous will not be long without finding some plausible extenuation of the greatest difficulties. Such, indeed, is the uncertainty of all human affairs, that security and despair are equal follies; and as it is presumption and arrogance to anticipate triumphs, it is weakness and cowardice to prognosticate miscarriages. The numbers that have been stopped in their career of happiness are sufficient to shew the uncertainty of human foresight; but there are not wanting contrary instances of such success obtained
