The increase of this efficiency is essentially the problem of the manager, and the amount to which it can be increased by proper study is, in most cases, so great as to be almost incredible.

Whatever we do must be in accord with human nature. We cannot drive people we must direct their development. The general policy of the past has been to drive but the era of force must give way to the era of knowledge, and the policy of the future will be to teach and lead, to the advantage of all concerned.