The average mind requires a change of environment before he can change his thought. He has to go somewhere or bring into his presence something that will suggest a new line of thinking and feeling. The master mind, however, can change his thought whenever he so desires. A change of scene is not necessary, because such a mind is not controlled from without. A change of scene will not produce a change of thought in the master mind unless he so elects.
"The Optimist Creed".