A thought-provoking book

I came across the Bridge of San Luis Rey by Thornton Wilder which won the 1928 Pullitzer Prize. It is evocative and contains the powerful final paragraph:

But soon we shall die and all memory of those five will have left the earth, and we ourselves shall be loved for a while and forgotten. But the love will have been enough; all those impulses of love return to the love that made them. Even memory is not necessary for love. There is a land of the living and a land of the dead, and the bridge is love, the only survival, the only meaning.

Barrack Obama quoted the book following the twin towers terrorist attack in 2001.