This is a good idea to keep always in mind. When you are uncertain whether you should do something or not, just think whether by doing it you will grow or deteriorate, and act accordingly.

I am a firm believer in "work when you work, and play when you play." When you give yourself up to pleasure you can develop concentration by thinking of nothing else but pleasure; when your mind dwells on love, think of nothing but this and you will find you can develop a more intense love than you ever had before.

When you concentrate your mind on the "you" or real self, and its wonderful possibilities, you develop concentration and a higher opinion of yourself. By doing this systematically, you develop much power, because you cannot be systematic without concentrating on what you are doing. When you walk out into the country and inhale the fresh air, studying vegetation, trees, etc., you are concentrating. When you see that you are at your place of business at a certain time each morning you are developing steadiness of habit and becoming systematic. If you form the habit of being on time one morning, a little late the next, and still later the following one, you are not developing concentration, but whenever you fix your mind on a certain thought and hold your mind on it at successive intervals, you develop concentration.

If you hold your mind on some chosen object, you centralize your attention, just like the lens of the camera centralizes on a certain landscape. Therefore always hold your mind on what you are doing, no matter what it is. Keep a careful watch over yourself, for unless you do your improvement will be very slow.

Practice inhaling long, deep breaths, not simply for the improvement of health, although that is no small matter, but also for the purpose of developing more power, more love, more life.

All work assists in development.

You may think it foolish to try to develop concentration by taking muscular exercises, but you must not forget that the mind is associated with muscle and nerve. When you steady your nerves and muscles, you steady your mind, but let your nerves get out of order and your mind will become erratic and you will not possess the power of direction, which, in other words, is concentration.

Therefore you understand how important exercises that steady the nerves and muscles are in developing concentration.

Everyone is continually receiving impulses that must be directed and controlled if one is to lead a successful life. That is the reason why a person must control the movements of his eyes, feet, fingers, etc.; this is another reason why it is important to control his breathing. The slow, deep, prolonged exhalations are of wonderful value. They steady the circulation, the heart action, muscles and nerves of the mind. If the heart flutters, the circulation is not regular, and when the lung action is uneven, the mind becomes unsteady and not fit for concentration.

This is why controlled breathing is very important as a foundation for physical health.

You must not only concentrate your mind, but also the action of the eyes, ears and fingers. Each of these contain miniature minds that are controlled by the master engineer. You will develop much quicker if you thoroughly realize this.

If you have ever associated with big men, or read their biographies, you will find that they usually let the others do the talking. It is much easier to talk than it is to listen.

There is no better exercise for concentration than to pay close attention when some one is talking. Besides learning from what they have to say, you may develop both mental and physical concentration.

When you shake hands with some one just think of your hand as containing hundreds of individual minds, each having an intelligence of its own. When you put this feeling into your hand shake it shows personality. When you shake hands in a listless way, it denotes timidity, lack of force and power of personality.

When the hand grip is very weak and stiff, the person has little love in his nature, no passion and no magnetism. When the hand shake is just the opposite, you will find that the nature is also. The loveless person is non-magnetic and he shows that he is by his non-magnetic hand shake. When two developed souls shake hands, their clasps are never light. There is a thrill that goes through both when the two currents meet. Love arouses the opposite currents of the positive and negative natures. When there is no love, life loses its charm. The hand quickly shows when love is being aroused. This is why you should study the art of hand shaking and develop your social affections. A person that loves his kind reflects love, but a person that hates reflects hate. The person with a bad nature, a hateful disposition, evil thoughts and feeling is erratic, freakish and fitful. When you allow yourself to become irritable, watch how you breathe and you will learn a valuable lesson. Watch how you breathe when you are happy. Watch your breathing when you harbor hate. Watch how you breathe when you feel in love with the whole world and noble emotions thrill you. When filled with good thoughts, you breathe a plentiful supply of oxygen into your lungs and love fills your soul. Love develops a person, physically, mentally and socially.

Breathe deeply when you are happy and you will gain life and strength; you will steady your mind and you will develop your power of concentration and become magnetic and powerful.

If you want to get more out of life you must think more of love.

Unless you have real affection for something, you have no sentiment, no sweetness, no magnetism. So arouse your love affections by your will and enter into a fuller life.

The hand of love always magnetizes, but it must be steady and controlled. Love can be concentrated in your hand shake, and this is one of the best ways to influence another.

The next time you feel yourself becoming irritable, use your will and be patient. This is a very good exercise in self-control. It will help you to keep patient if you will breathe slowly and deeply. If you find you are commencing to speak fast, just control yourself and speak slowly and clearly. Keep from either raising or lowering your voice and concentrate on the fact that you are determined to keep your poise, and you will improve your power of concentration.

When you meet people of some consequence, assume a reposeful attitude before them. Do this at all times. Watch both them and yourself. Static exercises develop the motor faculties and increase the power of concentration. If you feel yourself getting irritable, nervous or weak, stand squarely on your feet with your chest up and inhale deeply and you will see that your irritability will disappear and a silent calm will pass over you.

If you are in the habit of associating with nervous, irritable people, quit it until you grow strong in the power of concentration, because irritable, angry, fretful, dogmatic and disagreeable people will weaken what powers of resistance you have.

Any exercises that give you better control of the ears, fingers, eyes, feet, help you to steady your mind; when your eye is steady, your mind is steady. One of the best ways to study a person is to watch his physical movements, for, when we study his actions, we are studying his mind. Because actions are the expressions of the mind. As the mind is, so is the action. If it is uneasy, restless, erratic, unsteady, its actions are the same.

When it is composed, the mind is composed. Concentration means control of the mind and body. You cannot secure control over one without the other.

Many people who seem to lack ambition have sluggish minds. They are steady, patient and seemingly have good control, but this does not say they are able to concentrate. These people are indolent, inactive, slow and listless, because they lack energy; they do not lose control because they have little force to control. They have no temper and it therefore cannot disturb them. Their actions are steady because they possess little energy. The natural person is internally strong, energetic and forceful, but his energy, force and strength, thoughts and physical movements are well under his control.

If a person does not have energy, both mental and physical, he must develop it. If he has energy which he cannot direct and hold to a point he must learn to do so. A man may be very capable, but, unless he Wills to control his abilities, they will not do him any good.

We hear so much talk about the benefit of physical culture, but the real benefit of this is really lost sight of. There is nothing that holds the faculties at work in a sustained and continuous manner as static exercises do. For, as stated before, when you learn to control the body, you are gaining control over the mind.