All this, the positive and physical essence of mechanics, which makes its chief and highest interest for a student of nature, is in existing treatises completely buried and concealed beneath a mass of technical considerations. The Science of Mechanics (1893)
However well fitted atomic theories may be to reproduce certain groups of facts, the physical inquirer who has laid to heart Newton's rules will only admit those theories as provisional helps. and will strive to attain, in some more natural way, a satisfactory substitute. The Science of Mechanics (1893)