A Bullet-proof Coat

Once upon a time a clever man come to chief of an army and said, 'My lord! I have invented this bullet-proof coat. It will be a boon for soldiers, for it will save many a precious life. The chief examined the coat very carefully. But he failed to find any peculiarity in it. 'You may put it on, said he to the inventor, and let me see for myself, if it really stops a bullet. The chief, then, went in to fetch his gun. But, on his return, he found the inventor missing His coat was good for others but not for his own self.'