Voluntary attention is attention directed by the will to some object of our own more or less deliberate selection. It requires a distinct effort of the will in order to focus the attention in this way, and many persons are scarcely aware of its existence, so seldom do they manifest it. Voluntary attention is the result of training and practice, and marks the man of strong will, concentration, and character. Some authorities go so far as to say that much of that which is commonly called "will power" is really but a developed form of voluntary attention, the man of "strong will" holding before him the one idea which he wishes to realize. Involuntary attention, often called "reflex attention," is attention called forth by a nervous response to some sense stimulus. This is the common form of attention, and is but the same form which is so strongly manifested by children whose attention is caught by every new object, but which cannot be held for any length of time by a familiar or uninteresting one. It is of the utmost importance that one should cultivate his power of voluntary attention. Not only is the will power strengthened and developed in this way, but every mental faculty is developed by reason thereof. The training of the voluntary attention is the first step in mental development. TRAINING THE ATTENTION. That the voluntary attention may be deliberately trained and developed is a fact which many of the world's greatest men have proved for themselves. There is only one way to train and develop any mental power of faculty--and that is _by practice and use_. By practice, interest may be given to objects previously uninteresting, and thus the use of the attention develops the interest which further holds it. Interest is the natural road over which attention travels easily, but interest itself may be induced by concentrated attention. By studying and examining an object, the attention brings to light many new and novel features regarding the thing, and these produce a new interest which in turn attracts further and continued attention.