Situated, many hundred miles from our families in the howling wilderness, I believe few would have equally enjoyed the happiness we experienced. I often observed to my brother, You see now how little nature requires to be satisfied. Felicity, the companion of content, is rather found in our own breasts than in the enjoyment of external things; And I firmly believe it requires but a little philosophy to make a man happy in whatsoever state he is. This consists in a full resignation to the will of Providence; and a resigned soul finds pleasure in a path strewed with briars and thorns.
As quoted in "The Adventures of Col. Daniel Boon; containing a Narrative of the Wars of Kentucke" in The Discovery, Settlement And present State of Kentucke (1784) by John Filson