Haney's Art of Training Animals

 Dr. Kemp thus concisely and clearly stages the difference between instinct and reason: “In the former there is an irresistible impulse to go through a certain series of motions after a certain fashion, without knowing why they are performed, or what their result will be. In the latter the actions depend upon previous mental judgments, are performed or not at will, and the end of them is early anticipated and defined.”