W. Somerset Maugham Quotes

Oh, my dear boy, one mustn't expect gratitude. It's a thing that no one has a right to. After all, you do good because it gives you pleasure. It's the purest form of happiness there is. To expect thanks for it is really asking too much. If you get it, well, it's like a bonus on shares on which you've already received a dividend; it's grand, but you mustn't look upon it as your due.[The back of beyond]