If one is an artist, with the help of concentration one can produce wonderful works; if one is a scientist one can achieve great results in science; if one is a poet, poetry will be easy to write; if one is a mystic, mystical inspiration will flow; but without concentration, however qualified a person may be, he will not be able to make the best use of his qualifications; he can hardly be called qualified at all. It is by the power of concentration alone that he can express himself fully.