A rusty nail placed near a faithful compass will sway it from the truth and wreck the argosy.
Success - keeping your mind awake and your desire asleep.
Tell the truth work hard and come to dinner on time.
In my early professional years I was asking the question: How can I treat or cure or change this person? Now I would phrase the question in this way: How can I provide a relationship which this person may use for his own personal growth?