This is my own experience. I have experienced it with many people. There are words which, if they are used so many times for six weeks, the whole being of that person is changed, not only the spirit, but even the body is changed. The circulation of the blood is changed, the whole atmosphere of the person is changed. The power of the words is a living phenomenon. And when it is prescribed by the teacher who knows its secret, it is a prescription, it is an instruction. It is something that is most valuable.