"The reason that a good citizen does not use such destructive means to become wealthier is that, if everyone did so, we would all become poorer from the mutual destructiveness"

This quote by Richard Stallman is highlighting the value of being a great person and not using damaging methods to become wealthier. He is suggesting that if everyone were to use damaging ways to become wealthier, it would be destructive to everyone in the long run. This is because the mutual destructiveness would lead to a reduction in wealth for everybody. Therefore, it is essential to be a great person and not utilize devastating ways to become wealthier. This is because it would be beneficial for everybody in the long run. By being a great person, we can make sure that everyone can gain from the mutual prosperity that originates from not utilizing destructive ways.