I've learned, I think, to be able to distinguish between the necessary and the unnecessary as far as my limited outside time is concerned. Saying "no" politely is a necessity if one wants to lead any kind of stable life. ↗
In this most powerful nation in the world, lack of access to health care should not force local and state governments, companies and workers into bankruptcy, while causing unnecessary illness and hospitalization. ↗
Government is an unnecessary evil. Human beings, when accustomed to taking responsibility for their own behavior, can cooperate on a basis of mutual trust and helpfulness. ↗
Vigorous writing is concise. A sentence should contain no unnecessary words, a paragraph no unnecessary sentences, for the same reason that a drawing should have no unnecessary lines and a machine no unnecessary parts. ↗