“The greatest happiness is to know the source of unhappiness.”
“Your most unhappy customers are your greatest source of learning.”
“The search for happiness is one of the chief sources of unhappiness.”
“Satisfaction of one's curiosity is one of the greatest sources of happiness in life.Linus Pauling”
“To like many people spontaneously and without effort is perhaps the greatest of all sources of personal happiness.”
“It seems to me that the natural world is the greatest source of excitement; the greatest source of visual beauty; the greatest source of intellectual interest. It is the greatest source of so much in life that makes life worth living.”