The one gleam of sanity through it all is that we are both large temperamentally,4 large enough to often understand. true, we often understand but in vague glimmering ways, by dim perceptions, like ghosts, which, while we doubt, haunt us with their truth. and still, i, for one, dare not believe; for you are that tenth which i may not forecast. -- "love letter," jack london how does the author’s mention of the spiritual world in paragraph 5 contribute to the development of his ideas about love, relationships, and human nature?