Disclaimer: Tolkien’s, yes all of it...
I kept my father’s oath, was loyal to my brothers, fought beside them even though my doubts grew. Righteous rage had heated our blood, made us thirst for retribution. We slew our Kin for it! Refusing councel, distaining restraint... we laid siege to that despicable traitor Melkor - to what end?
A father, five brothers dead... finally we two remained, obligated to retrieve our inheritance, but it burned... faithful I was, but unworthy...
Long ages have passed; I look West no longer when I sing by the waters. I was loyal to my family... but the Valar never forgave that fidelity.