Pilgrim's Progress §103: I beheld, then, that they all went on till they came to the foot of the Hill Difficulty...

I beheld, then, that they all went on till they came to the foot of the Hill Difficulty; at the bottom of which was a spring. There were also in the same place two other ways besides that which came straight from the gate; one turned to the left hand, and the other to the right, at the bottom of the hill; but the narrow way lay right up the hill, and the name of the going up the side of the hill is called Difficulty. Christian now went to the spring, and drank thereof, to refresh himself , and then began to go up the hill, saying-- "The hill, though high, I covet to ascend, The difficulty will not me offend; For I perceive the way to life lies here. Come, pluck up heart, let's neither faint nor fear; Better, though difficult, the right way to go, Than wrong, though easy, where the end is woe."