About your stagnation & melancholy -- I shall have to give you a lecture when I get hold of you next summer!![...] I hope your recent state is merely one of transition from the idealism of youth to the realism of middle life, when the thinker realises that there is no such thing as ideal happiness & ceases to strive after illusions so empty & unreal. Solid bourgeois contentment -- with the settled conviction that wild pleasures are too rare, elusive, & transitory to be worth seeking -- is the best state of mind to be in.[...] To enjoy tranquillity & to promote tranquillity in others, is the most enduring of delights. Such was the doctrine of Epicurus, the leading ethical philosopher of the world. If one's interest in life wanes, let him turn to the succour of others in a like plight, & some grounds for interest will be observed to return.[...] That I have been able to cheer here & there an aged man, an infirm old lady, a dull youth, or a person deprived by circumstances of education, affords to me a sense of being not altogether useless, which almost forms a substitute for the real success I shall never know. What matter if none hear of my labours, or if these labours touch only the afflicted & the mediocre? Surely it is well that the happiness of the unfortunate be made as great as possible; & he who is kind, helpful, & patient, with his fellow-sufferers, adds as truly to the world's combined fund of tranquillity as he who, with greater endowments, promotes the birth of empires, or advances the knowledge & civilisation of mankind. Thus no man of philosophical cast, however circumscribed by poverty or retarded by ailment, need feel himself superfluous so long as he holds the power to improve the spirit of others.