Part of Christ's humiliation was becoming a man in a sinful world in order to save his sinful people. The Lord of glory "made Himself of no reputation" (Phil. 2:7) by becoming one of us. Jesus Christ had to undergo the humiliation of being born in this world because he, as the Second Adam, had to be truly of the earth while still being of heaven.
Source: New Horizons, 2005. 3 pages.