"The only service a friend can really render is to keep up your courage by holding up to you a mirror in which you can see a noble image of yourself." – George Bernard Shaw 
 
"There is no man that imparted his joys to his friends, but he joys the more; and no man that imparted his grieves to his friends, but he grieves the less." – Francis Bacon 
 
"Between friends there is no need of justice." – Aristotle 
 
"How casually and unobservedly we make all our most valued acquaintances." –  Ralph Waldo Emerson 
 
"Happiness consists more in small conveniences or pleasures that occur every day, than in great pieces of good fortune that happen but seldom." – Benjamin Franklin 
 
"Man's real life is happy, chiefly because he is ever expecting that it soon will be so." – Edgar Allan Poe 
 
"A man should always consider how much he has more than he wants, and how much more unhappy he might be than he really is." – Joseph Addison 
 
"Happiness is an expression of the soul in considered actions." –  Aristotle 
 
"All happiness depends on courage and work." –  Honore de Balzac 
 
"Man needs, for his happiness, not only the enjoyment of this or that, but hope and enterprise and change." –  Bertrand Russell