There is no point in arguing that a materialistic man can be happy. No materialistic creature be he the great Brahmā or an insignificant ant can be happy. Everyone tries to make a permanent plan for happiness, but everyone is baffled by the laws of material nature. Therefore the materialistic world is called the darkest region of God's creation. Yet the unhappy materialists can get out of it simply by desiring to get out. Unfortunately they are so foolish that they do not want to escape. Therefore they are compared to the camel who relishes thorny twigs because he likes the taste of the twigs mixed with blood. He does not realize that it is his own blood and that his tongue is being cut by the thorns. Similarly, to the materialist his own blood is as sweet as honey, and although he is always harassed by his own material creations, he does not wish to escape.
Teh whole text: http://vedabase.net/sb/1/2/3/en
