A friend who has good habits, who is gentle and well- mannered is an inestimable friend. His good character improves you and in due course you will turn out to be well-mannered and gentle even if you had some bad qualities. A friend who helps you by giving you advice, by helping you to clear your doubts in your lessons, a friend who is intelligent and knowledgeable is indeed an inestimable friend. A friend in need is a friend indeed.