The present is a fleeting moment, the past is no more; and our prospect of futurity is dark and doubtful. This day may possibly be my last: but the laws of probability, so true in general, so fallacious in particular, still allow about fifteen years. [Mr. Buffon, from our disregard of the possibility of death within the four and twenty hours, concludes that a chance, which falls below or rises above ten thousand to one, will never affect the hopes or fears of a reasonable man. The fact is true, but our courage is the effect of thoughtlessness, rather than of reflection. If a public lottery were drawn for, the choice of an immediate victim, and if our name were inscribed on ore of the ten thousand tickets, should we be perfectly easy?] I shall soon enter into the period which, as the most agreeable of my long life, was selected by the judgment and experience of the sage Fontenelle. His choice is approved by the eloquent historian of nature, who fixes our moral happiness to the mature season in which our passions are supposed to be calmed, our duties fulfilled, our ambition satisfied, our fame and fortune established on a solid basis (see Buffon). In private conversation, that great and amiable man added the weight of his own experience; and this autumnal felicity might be exemplified in the lives of Voltaire, Hume, and many other men of letters. I am far more inclined to embrace than to dispute this comfortable doctrine. I will not suppose any premature decay of the mind or body; but I must reluctantly observe that two causes, the abbreviation of time, and the failure of hope, will always tinge with a browner shade the evening of life.