“ All other good, however great in reality or appearance, excites not a man’s desires who looks not on it to make a part of that happiness wherewith he, in his present thoughts, can satisfy himself. ”
 John Locke, An Essay Concerning Human Understanding (1689). copy citation

Context

“yet all good, even seen and confessed to be so, does not necessarily move every particular man’s desire; but only that part, or so much of it as is considered and taken to make a necessary part of HIS happiness. All other good, however great in reality or appearance, excites not a man’s desires who looks not on it to make a part of that happiness wherewith he, in his present thoughts, can satisfy himself. Happiness, under this view, every one constantly pursues, and desires what makes any part of it: other things, acknowledged to be good, he can look upon without desire, pass by, and be content without.” source