But there is nothing to be done till a horse's head is settled.

- William Cavendish, 1st Duke Of Newcastle

You should pull him back besides in all the lines before the quarter, just as you make the others advance.

- William Cavendish, 1st Duke Of Newcastle

You must in all Airs follow the strength, spirit, and disposition of the horse, and do nothing against nature; for art is but to set nature in order,…

- William Cavendish, 1st Duke Of Newcastle

The horse's neck is between the two reins of the bridle, which both meet in the rider's hand.

- William Cavendish, 1st Duke Of Newcastle

Without knowing this, no man can dress a horse perfectly.

- William Cavendish, 1st Duke Of Newcastle