A Voice from the Past - Chesterton

My acceptance of the universe is not optimism, it is more like patriotism. It is a matter of primary loyalty. The world is not a lodging-house in Brighton, which we are to leave because it is miserable. It is the fortress of our family, with the flag flying on the turret, and the more miserable it is the less we should leave it. The point is not that this world is too sad to love or too glad not to love; the point is that when you do love a thing, its gladness is a reason for loving it, and its sadness is a reason for loving it more. All optimistic thoughts about England and all pessimistic thoughts about her are alike reasons for the English patriot. Similarly, optimism and pessimism are alike arguments for the cosmic patriot.

G. K. Chesterton, 1874-1936, Orthodoxy, The Flag of the World (Dover Publications, 2004, p. 59)

Is this the right approach to the world? Why or why not? How would it affect how we live?