"By this way you may dress all sorts of horses in the utmost perfection, if you know how to practice it; a thing that is very easy in the hands of a master"

This quote by William Cavendish is referring to the art of horsemanship. He is suggesting that if one has the understanding and ability of a master, they can dress any horse in the utmost perfection. This means that they can groom and train the horse to the highest standard. Cavendish is implying that the skill of horsemanship is easy to find out, however it needs a master to be able to do it properly. He is recommending that with the best knowledge and practice, anyone can end up being a master of horsemanship. This quote is a reminder that with commitment and effort, anyone can end up being a professional in any field.