How do you know that? Are you God?
Forgive me for jumping in here, SkyPilot.
God said it:
"Turn to me and be saved, all you ends of the earth; for I am God, and there is no other. By myself I have sworn, my mouth has uttered in all integrity a word that will not be revoked: Before me every knee will bow; by me every tongue will swear." Isaiah 45:23
Paul, as God's appointed representative, said so as well:
"Therefore God exalted him to the highest place and gave him the name that is above every name, that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, and every tongue confess that Jesus Christ is Lord, to the glory of God the Father."--Philippians 2:9-11