"If you ever get a high official position in your country, you must see the interests of the humanity much more important than the interests of your own country; only then you will deserve to be called a great man!"

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There are some simple maxims which I think might be commended to writers of expository prose. First: never use a long word if a short word will do. So, if you want to make a statement with a great many qualifications, put some of the qualifications in separate sentences. Third: do not let the beginning of your sentence lead the reader to an expectation which is contradicted by the end.

— Bertrand Russell