" A puppy needs an unbelievable amount of educating. It is a task to wear threadbare the teacher’s patience and to do all kinds of things to the temper. Small wonder that many humans lose patience and temper during the process and idiotically resort to the whip, to the boot toe and to bellowing—in which case the puppy is never decently educated, but emerges from the process with a cowed and broken spirit or with an incurable streak of meanness that renders him worthless. Time, patience, firmness, wisdom, temper control, gentleness—these be the six absolute essentials for training a puppy. "
― Albert Payson Terhune , Lad: A Dog