To gain knowledge of concentration requires not only study, but balance also. Before touching this subject I would first like to explain what motive we have behind concentration. There are two aspects of life: the audible life and the silent life. By audible life I mean all experiences, all sensations that we experience through our five senses. This is distinct from the life which I would call the silent life. And when one asks what benefit one derives from getting in touch with the silent life, the answer is that the benefit is as abstract as the silent life itself. The life of sensation is clear; its benefit is clear; and yet as limited as is the life of sensation, so limited is its benefit. That is why in the end we find all our experiences of little value. Their importance lasts as long as we experience them; but after that the importance of the life of sensation is finished.

The value of silent life is independent. We are inclined to attach a value to something which concerns our outer life. The silent life does not give us a special benefit but a general benefit. In other words, if there is a minor wound on the body an external application of a certain medicament can cure it; but there are other medicines which can cure the general condition, and this is more satisfactory than the external cure, though it is less spectacular.

One cannot say exactly what profit is gained by concentration, but in reality every kind of profit is to be attained through concentration, in all directions. There are two kinds of concentration: automatic concentration and intentional concentration.

Automatic concentration is found in many people who do not know that they concentrate and yet they do. They concentrate automatically, some to their disadvantage, some to their advantage.
- Those who concentrate to their advantage are the ones whose mind is fixed on their business, on their art, on any occupation they have. They are the ones who because of their concentration can work more successfully; be it a composer, a writer, or a musician, according to his power of concentration so will be his success.
  
  I once had the pleasure of hearing Paderewski in his own house. He began to play gently on his piano. Every note took him into a deeper and deeper ocean of music. Any meditative person could see clearly that he was so concentrated in what he did that he knew not where he was.
  
  The works of great composers which will always live, which win the hearts of men, whence do they come? From concentration. So it is with a poet, so it is with an artist; it is concentration which brings color and line, which makes the picture. Naturally, whether it be an artist or a writer, a musician or a poet, or somebody who is in business or industry, in the absence of concentration he can never succeed.
- Sometimes concentration works to a disadvantage. There are some people who always think that they are unlucky, that everything they do will go wrong, who think that everybody dislikes them, that everybody hates them. Then some begin to think that they are unable to do anything, that they are incapable, useless. Others out of self-pity think that they are ill. In that way even if they are not ill they create illness. Some by concentration cherish illness, always think of it. No physician could be successful with them. An old physician once said, "There are many diseases, but there are many more patients." Once a person has become a patient through concentration, he is difficult to cure. And there are many such cases of automatic concentration to the disadvantage of man.
Intentional concentration is taught by thinkers, philosophers, and meditative people.

The whole of mysticism, of esotericism, is based upon the idea of concentration. This mystical concentration can be divided into four different grades. The first is concentration, the next contemplation, the third meditation, the fourth realization.