The sound goes through the ear to the mind, the heart and the soul. When the feeling, when the thought is spoken, its power becomes greater. If a person speaks of his sorrow, if he tells his grief to another, often he may begin to cry. While he kept the feeling in his heart, the thought in his mind, he did not cry, but when he spoke he wept. Sometimes a humorous person, when telling something funny that he has seen, begins to laugh at his own words. While he only thought of it he did not laugh, but when he speaks of it he laughs. If we keep a thought in our mind, it has not the strength that it has when we speak it out.