"…without hope, without God, in the world." – Ephesians 2:12c
The material man is the man who believes that all that can be seen is all that there is. To this man there is no immaterial world; there is no world of spirits, or gods, angels or fairies. Psychology may be the study of the soul but there really is no soul. The material man may use the language of love or hate, of hope or despair, but at those times he is borrowing the language of a world in which he does not believe. For the world of the strict materialist is a world that is bleak: void of color, art, or dreams.
G.K. Chesterton, the quite brilliant English Roman Catholic writer of the early 20th century, in a book worth reading (Orthodoxy) writes,
Now it is the charge against the main deductions of the materialist that, right or wrong, they gradually destroy his humanity; I do not mean only kindness, I mean hope, courage, poetry, initiative, all that is human. For instance, when materialism leads men to complete fatalism (as it generally does), it is quite idle to pretend that it is in any sense a liberating force. It is absurd to say that you are especially advancing freedom when you only use free thought to destroy free will.
Fortunately, there are still enough remnants of reasonableness in most people that most people can see the end game of the material man. A world void of "hope, courage, poetry, initiative" is not a world that most people desire. So most understand and continue to believe that we are more than electrically charged chemicals and particles without meaning or direction or purpose. Most people continue to hang on to some vestiges of faith in something or Someone that is unseen, and that is greater than mere matter.
The Bible's message is, of course, that this Unseen One is God, the Creator and Sustainer of all that is (all that matter) and that we, his image bearers, are destined to an existence of eternal life in him. Jesus, God in the flesh, procured that destiny for us by his life, death and resurrection. Our having come to this realization and embracing it is what has opened our eyes to now see beyond the world of the strict materialist. C.S. Lewis wrote that once he moved from atheism to theism, suddenly it was as though the flowers were more beautiful, the colors more vivid, the sky more blue. Color, arts and dreams lie only in the world of the believer in that which cannot be seen.