Why is it so hard for others to see and acknowledged glory of the Lord!

My brothers and sisters in Christ, let us continue to spread the good news of Christ, let us continue to tell the world of his glories, his wonders and his awesome goodness, as many refuse to acknowledge him, but, the Lord has spoken. He said, “Then I will purify the lips of the peoples, that all of them may call on the name of the Lord and serve him shoulder to shoulder. Every knee shall bow and every tongue will confess, that Jesus Christ is Lord, and the earth will be filled with the knowledge of the glory of God, as the waters cover the sea.”