Correct ideas have a healing effect on man, and wrong ideas make him sick. One can find a wrong idea behind every disease, if one traces it back. Mankind in general is responsible for this and not individuals. Interest also has a destructive effect when people run from one sensation to the other and always want to be amused. That makes people sick. It’s also a hindrance to progress to have a personal interest in higher knowledge. Men become scleroticized thereby. A man must not become indifferent to his surroundings. He must retain his feeling and sympathy for his surroundings. Some say that sympathy can also come from egotism. That may be the case. Many kinds of sympathy only arise because one doesn’t want to see other people suffer. That’s even a good thing. It’s better for a man to help someone out of egotistical sympathy than not to help him at all. But we must learn to develop a sympathy that stands above egoism, that helps neighbors because it’s one’s duty to help them.
Source: Rudolf Steiner – GA 266 – From the Contents of Esoteric Classes: Esoteric Lesson – Berlin, 5-15-1908