Any man who shirked his work, who dawdled and idled, received no mercy; slackness is even worse than harshness; for exactly as in battle mercy to the coward is cruelty to the brave man, so in civil life slackness towards the vicious and idle is harshness towards the honest and hardworking.
 Theodore Roosevelt, Theodore Roosevelt; an Autobiography (1913). copy citation

Context

“I finally solved the problem, as far as Government employees were concerned, by calling in Charles P. Neill, the head of the Labor Bureau; and acting on his advice, I speedily made the eight-hour law really effective. Any man who shirked his work, who dawdled and idled, received no mercy; slackness is even worse than harshness; for exactly as in battle mercy to the coward is cruelty to the brave man, so in civil life slackness towards the vicious and idle is harshness towards the honest and hardworking. We passed a good law protecting the lives and health of miners in the Territories, and other laws providing for the supervision of employment agencies in the District of Columbia, and protecting the health of motormen and conductors on street railways in the District.” source