It is said that contagious diseases are contracted by the microbes going from one person to another, in the breath, in the air, in everything; but it is not always the microbes, it is very often the impression. When a person has seen that his friend has caught a cold and has thought, "I fear I shall catch it," he has certainly caught the disease; because he has been afraid and has been impressed by it, he has caught it. It is not always necessary that the germs of the cold should have gone from one person to another by way of the breath; the impression that a person has received can create them, for behind the whole of creation there is that power. We often see that the more a person is afraid of a thing, the more he is pursued by it, for unconsciously he concentrates upon it.