When an infant is quiet, contented, passive, happy-natured, one must not be contented about it, because it may not prove to be good in the end. That infant should be made a little more active. A little more attention must be given to it, a few more playthings, a little more thought must be given. It should be stimulated, it should be picked up and its attention attracted to this or that, so that it may become more active and more interested in the things it sees; that will bring about a proper balance.