Thomas Jefferson, who wrote, in 1787, in a letter to a friend: “The moral sense, or conscience, is as much a part of man as his leg or arm. It is given to all human beings in a stronger or weaker degree, as force of members is given them in a greater or less degree. It may be strengthened by exercise, as may any particular limb of the body.” - http://www.newrepublic.com/article/116200/moral-design-latest-form-intelligent-design-its-wrong