Pure white light such as shone in the face of my father Eru.
Such is what I wielded in the battle against Morgoth in the War of the Powers, when the elves were newly awoken. It cuts through gloom and darkness and strips bare and reveals unto the world evils that try to hide themselves.
Commitment is always listening to the prayers of the Children of Ilúvatar, it is having to live through the pain of decrees I have supported, it is always caring for the world I helped build and all the people in it.
Commitment is not always easy but nothing worthwhile is.