You can buy a person's time; you can buy their physical presence at a given place; you can even buy a measured number of their skilled muscular motions per hour. But you can not buy enthusiasm... you can not buy loyalty. You can not buy the devotion of hearts, minds, or souls. You must earn these.
No matter how full a reservoir of maxims one may possess, and no matter how good one's sentiments may be, if one has not taken advantage of every concrete opportunity to act, one's character may remain entirely unaffected for the better.