"Just as the education of nerve and sinew is vital to the excellent athlete and education of the mind is vital to the scholar, education of the conscience is vital to the truly proactive, highly effective person. Training and educating the conscience, however, requires even greater concentration, more balanced discipline, more consistently honest living. It requires regular feasting on inspiring literature, thinking noble thoughts and, above all, living in harmony with its still small voice."

Source: Stephen R. Covey (1994). “Daily Reflections for Highly Effective People: Living THE SEVEN HABITS OF HIGHLY SUCCESSFUL PEOPLE Every Day”, p.361, Simon and Schuster