Understanding the theory of riding is an essential basic so you can choose the right methods during practice. A rider will need to continue to search for the best methods throughout their whole riding career because of the dimension and complexity of this subject. Therefore, we will never reach the point where we can say: "Now I know everything."
On my search looking for the truth I have met many people that share my experiences, opinions and ambitions, and I've met some that have completely different ideas. I would like to advise every horseman never to judge different philosophies before having tried them because we can learn a lot from each other. On the other hand: Never accept training methods, which are based on constraint and subordination of the horse by force!