It has been a singular happiness to me, and a proof, I believe, of a radically good constitution, that I have always slept well, and have awaked with my faculties perfectly vigorous, without any disposition to drowsiness. Also, whenever I have been fatigued with any kind of exertion, I could at any time sit down and sleep; and whatever cause of anxiety I may have had, I have almost always lost sight of it when I have got to bed; and I have generally fallen asleep as soon as I have been warm.[20] I even think it an advantage to me, and am truly thankful for it, that my health received the check that it did when I was young; since a muscular habit from high health, and strong spirits, are not, I think, in general accompanied with that sensibility of mind, which is both favourable to piety, and to speculative pursuits.[21] [20] My father was an early riser. He never slept more than six hours. He said he did not remember having lost a whole night’s sleep but once, though when awake he often had to suffer much from pain and sickness as well as from other circumstances of a very afflictive nature. [21] Though not a muscular man he went through great exertion at various times of his life with activity. He walked very firmly, and expeditiously. To a fundamentally good constitution of body, and the being who gave it me, I owe an even chearfulness of temper, which has had but few interruptions. This I inherit from my father, who had uniformly better spirits than any man that I ever knew, and by this means was as happy towards the close of life, when reduced to poverty, and dependent upon others, as in his best days; and who, I am confident, would not have been unhappy, as I have frequently heard him say, in a workhouse. Though my readers will easily suppose that, in the course of a life so full of vicissitude as mine has been, many things must have occurred to mortify and discompose me, nothing has ever depressed my mind beyond a very short period. My spirits have never failed to recover their natural level, and I have frequently observed, and at first with some surprize, that the most perfect satisfaction I have ever felt has been a day or two after an event that afflicted me the most, and without any change having taken place in the state of things. Having found this to be the case after many of my troubles, the persuasion that it _would_ be so, after a new cause of uneasiness, has never failed to lessen the effect of its first impression, and together with my firm belief of the doctrine of necessity, (and consequently that of every thing being ordered for the best) has contributed to that degree of composure which I have enjoyed through life, so that I have always considered myself as one of the happiest of men.