This essay covers the aesthetic reasons, but also some practical ones, for sailing without an engine. Not a rant, but certainly a purist's view.
Club dedicated to promoting the skill, character, and seamanship displayed by those who sail in its traditional fashion - without the aid of engines. The site contains a book-length treatise on these various skills.
Lots of reasons to do without an engine, together with tips for maneuvering the boat under sail only. 4 pages with photos.
An argument that resisting modern technical devices - automated navigation, electric winches, TV and satellite receivers as examples - enhances your privacy, literacy, opportunity for conversation, and enjoyment of the sea. 2 pages.
Modernization and civilization on a cruising yacht are different animals. If you want to understand the difference, read this. 5 pages with photos.