Those three words are heavier than the whole paragraph that came before them, or as Lúthien puts it, "... they have the weight of an entire world." Then let's think of the paragraph as the world indeed, and the last sentence as... atoms even. The fact that one is smaller, does not lessen its importance or value. On the contrary, the world owes it existence to atoms, perhaps just as the complexity of the paragraph owing to the underlying simple "good versus evil" concept of the sentence. Then maybe, our existence gives meaning to the Universe. Or in Sagan's words, "We are a way for the cosmos to know itself." And the Universe as a whole is indeed greater than our minds can comprehend, but let's not forget: As above, so below. Heights and depths, within and outside. (x)Now news came to Hithlum that Dorthonion was lost and the sons of Finarfin overthrown, and that the sons of Fëanor were driven from their lands. Then Fingolfin beheld (as it seemed to him) the utter ruin of the Noldor, and the defeat beyond redress of all their houses; and filled with wrath and despair he mounted upon Rochallor his great horse and rode forth alone, and none might restrain him. He passed over Dor-nu-Fauglith like a wind amid the dust, and all that beheld his onset fled in amaze, thinking that Oromë himself was come: for a great madness of rage was upon him, so that his eyes shone like the eyes of the Valar. Thus he came alone to Angband's gates, and he sounded his horn, and smote once more upon the brazen doors, and challenged Morgoth to come forth to single combat.
And Morgoth came.
Just some random thoughts that I thought I could share here.