During the last decade, man, as a technological innovator, has accelerated his rate of learning and accomplihsment at a rate far beyond the imagination of the most visionary of science's founding fathers.  This very intelligence has made man the strongest of earth's guests because man is able to utilize natural resources to his advantage and is the only creature to perfect the use of tools for his own needs.  As he is the strongest so is man weak, weak because of his vanity and selfishness.  Shimabuku relates a story of an old Chinaman who was traveling through the countryside when a terrible storm broke loose.  Upon seeking shelter in a nearby cave the old man found himself face to face with a tiger who had, himself, fled the elements and sought shelter in the cave.  The old man, for he was wise with many years, had no interest in anything but shelter and made no motion toward the tiger.  The tiger also bore no malice toward the old man and in this manner they shared the cave together.  They both had something in common and were in harmony.  So, "If a Man's Heart is the same as the Heaven and Earth" he has no quarrel and therefore no need to fight.