Now, whereas the gods have given to men the power of instructing one another in their duty by word of mouth, it is obvious that you can teach a horse nothing by word of mouth. If, however, you reward him when he behaves as you wish, and punish him when he is disobedient, he will best learn to do his duty. This rule can be stated in few words, but is applies to the whole art of horsemanship. He will receive the bit, for example, more willingly if something good happens to him as soon as he takes it. He will also leap over and jump out of anything, and perform all his actions duly if he can expect a rest as soon as he has done what is required of him.