A fourth fundamental is to appreciate the big part played in man's control by his own personal instincts and habits. "Man is a reasoning creature. God's image." Yes; but he is also the willing slave of instinctive impulses and personal habits. He uses his reason to determine the course he will pursue, not to regulate the multitudinous details of his actions in carrying it on. As planned by nature, these minor actions are directed by natural impulses and personal habits. Impulses and habits--they rule almost our every act. It is remarkable when we stop to think of it and realize how few things we do actually as the result of thinking. Thus in a well-ordered life a man may get up in the morning, bathe, shave, dress, and go to breakfast without having to make a conscious decision. Instead of having to decide which shoe to put on first, he even laces and ties his shoes without thinking, and thus may occupy his mind with thoughts of the day's work. Habit guides him without thought through all these necessary steps which he must take daily. The interesting fact to the leader is not alone that these habits control so absolutely, but that any habit may be easily and unconsciously formed by repetition of the act or thought, and that a habit once formed is overcome only by conscious effort and even by determined action of the will. The leader uses this for controlling his men. By insisting on certain things always being done in certain ways, he establishes in them habits of daily conduct which make his routine administration of duties free from constant care of details. A wise leader finds the reason for many of the difficulties and seeming derelictions of his men in the fact that they were the acts of previously formed habits not yet eliminated. For this reason also he prefers to train green men rather than old ones. He knows he can readily inculcate in them the habits he wants them to have, and without the great difficulty of eradicating the previously formed habits which he does not like.