What philosophy should do in matters of feeling is very closely analogous to what it should do in matters of thought. It should not subtract from the personal life but should add to it. Just as the philosopher's intellectual survey is wider than that of an uneducated man, so also the scope of his desires and interests should be wider. Buddha is said to have asserted that he could not be happy so long as even one human being was suffering. This is carrying things to an extreme and, if taken literally, would be excessive, but it illustrates that universalizing of feeling of which I am speaking. .
Source: Bertrand Russell : Philosophy for Our Time (1953).
More info.: https://russell-j.com/beginner/1026_PfOT-030.HTM