How does one prepare oneself?. How does one make the reflectors ready in order to make the impression of the word? Yogis and Sufis have found certain practices by which a kind of psychological development is brought about. Through these a person becomes naturally more and more sincere and earnest, and everything he says bears that influence, that power. Perhaps these practices have no value according to the science of voice production, but they have very great value according to the psychological point of view. It is such practices which have been considered as concentration, meditation, contemplation, realization.