There are two principal temperaments in infants: active and passive. There is an infant that is quite happy in the place where it is put, quite contented, enjoying itself; it cries only when it is hungry. And there is another infant who is always doing something; either it must cry, or break, or tear something; it must do something all the time. The best thing is to bring the infant back to a normal rhythm. An active infant must be quieted by the influence of the guardian; by attracting its mind to a certain thing, by beating time and getting it into a certain rhythm. Infancy is the time when the impulsive nature can be trained, and that is the time to draw out what is really best in the impulsive nature and utilize the impulsive nature to its best advantage.