The principle of materialized world is the same as of human life. The human life is governed by the human mind composed of the copies of the materialized world. The stress is due to the human mind inside. The creativity is prevented by the copies in the human mind. The convergence is not easy due to the individual copy world which is different from each other. By subtraction of the copies inside the human, the creativity and convergence can be fulfilled. Syllabus of the lecture at KAIST is introduced. Students taking the lecture express the non-materialized world of human mind clearly after the subtraction the copies inside. The students who recognize the stress inside specifically can be free from the stress by discarding the copies inside.