Earth provides enough to satisfy every man's need, but not every man's greed.
There is much suffering in the world - physical, material, mental. The suffering of some can be blamed on the greed of others. The material and physical suffering is suffering from hunger, from homelessness, from all kinds of diseases. But the greatest suffering is being lonely, feeling unloved, having no one. I have come more and more to realize that it is being unwanted that is the worst disease that any human being can ever experience.
You must lay aside your greed; have no unworthy motive in your desire to become rich and powerful. It is legitimate and right to desire riches, if you want them for the sake of your soul, but not if you desire them for the lists of the flesh.