It is true that the student of philosophy, understanding the impermanent and imperfect nature of this world, has in one sense renounced the quest of personal happiness, but he has renounced it only as an end in itself. He comprehends, on the one hand, that it is futile to demand perfection and permanence when the ever-changing world cannot by its very nature give them. To seek to establish personal happiness under such conditions is to travel farther away from it. He comprehends, on the other hand, that so long as he feels for and with other living creatures he cannot be fully happy whilst so many among them are immersed in suffering. But all this is not to say that he need forgo the quest of the higher trans-worldly happiness which is entirely independent of persons, places, and things and which is to be found within the Overself alone. Moreover, he realizes that it is his duty to attain it precisely because he must attain the power to lift those suffering creatures above their misery and gloom, to infuse in them the life-giving qualities of hope, courage, and serenity which will help them triumph over difficulties. Thus there is no adequate reason why he should be less happy than other men. The depth of his thinking and discipline of his senses do not prevent his sharing in the beauty-bringing arts, the laughter-raising fun, and the lighter diversions of human living. Indeed, by his efforts to reshape his thought and conduct, he is eliminating a number of causes which would otherwise bring him future worry and misery, just as he is fortifying himself to bear present trouble with calmness and wisdom. Moreover, he is on the path to realizing for himself--if he has not already partially realized it--that inexpressible inner beauty and satisfying bliss which accompany the consciousness of the Overself. Even from afar its reflected light shines down upon his path, to cheer the mind and warm the heart. No--he cannot be a miserable man. He is in the process of finding an exalted and enduring happiness which is not bought at the expense of others, but rather shared with others.
-- Notebooks Category 6: Emotions and Ethics > Chapter 2 : Re-Educate Feelings > # 259