“A good trainer will always remember that his training should be adjusted so that love, justice, honour, truth, will be reflected all through the daily lesson. A dog should never be tricked or deceived.”
Richardson, Liet.-C. E. H. (1924). WATCH-DOGS: Their training and management (2nd ed., p. 77) [Review of WATCH-DOGS: Their training and management]. Hutchinson & Co. (Original work published 1923)