Continual Endeavour and Endurance

Thomas Carlyle, The French Revolution, Vol. I (London: George Bell and Sons, 1902), p. 62:

Man is not what one calls a happy animal; his appetite for sweet victual is so enormous. How, in this wild Universe, which storms in on him, infinite, vague-menacing, shall poor man find, say not happiness, but existence, and footing to stand on, if it be not by girding himself together for continual endeavour and endurance? Woe, if in his heart there dwelt no devout Faith; if the word Duty had lost its meaning for him!