What does Quality with the horse mean to you?
What do you consider as Success?
How often do you consider how the horse's mind and emotions influence his physical responses, versus fixating on containing his movement?
Where is your focus, and are you mentally present and available to acknowledge and address the horse?
Are you willing to let go or adapt your original goal whether temporarily, short or even long-term, to prioritize building trust, try, and willingness in the horse?