“ A sense of duty is useful in work, but offensive in personal relations. People wish to be liked, not to be endured with patient resignation. ”
 Bertrand Russell, The Conquest of Happiness (1930). copy citation

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“Being happy in himself, he will be a pleasant companion, and this in turn will increase his happiness. But all this must be genuine; it must not spring from an idea of self-sacrifice inspired by a sense of duty. A sense of duty is useful in work, but offensive in personal relations. People wish to be liked, not to be endured with patient resignation. To like many people spontaneously and without effort is perhaps the greatest of all sources of personal happiness.
I spoke also in the last paragraph of what I call a friendly interest in things. This phrase may perhaps seem forced; it may be said that it is impossible to feel friendly to things.” source

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