The careless man, the lazy man are each indifferent as to how their work is done; such men seldom do well that which they undertake.

Everything carelessly or lazily done is incomplete, inadequate, incompetent, and, therefore, a source of distress, discontent, and worry.

A careless or lazy plumber causes much worry, for, even though his victims may have learned the lesson I am endeavoring to inculcate throughout these pages, it is a self-evident proposition that they will not allow his indifferent work to stand without correction.

Therefore, the telephone bell calls continually, he or his men must go out and do the work again, and when pay-day comes, he fails to receive the check good work would surely have made forthcoming to him.
The schoolboy, schoolgirl, has to learn this lesson, and the sooner the better.

The teacher never nags the careful and earnest student; only the lazy and careless are worried by extra lessons, extra recitals, impositions, and the like.
All through life carelessness and laziness bring worry, and he is a wise person who, as early as he discovers these vices in himself, seeks to correct or, better still, eliminate them.
Another form of worry is that wherein the worrier is sure that no one is to be relied upon to do his duty.