There is some discussion on the difference between submission and acceptance. I'm not convinced that there is . Submission is not a dirty word, it's not reluctant subservience but the establishment of harmony between horse and rider. The aim is a horse ' on the aids' , i.e. accepting the aids in a relaxed manner and submitting, without resistance, to the will of the rider . To arrive at physical submission the horse murt develop impolsion, rhythm [ and balance], suppleness, straitness and acceptanceof the bit, so that he will find it easy to work 'with' and not 'for' his rider.