Tupac's poem tries to explain Van Gogh's interaction with the world.  While Van Gogh pours his heart and emotion into his paintings in an attempt to satisfy the world, Tupac explains that people appreciated his work, but not him as a person.  Van Gogh's sole goal was to satisfy his audience, but he didn't receive this kind of attention back.  His audience appreciated his work, but not his life or what he had been through.  While Van Gogh sought to satisfy the people, the people didn't appreciate him, only his art.