The most satisfactory purposes are those that lead on indefinitely from one success to another without ever coming to a dead end; and in this respect it will be found that construction is a greater source of happiness than destruction. ... At the same time few things are so likely to cure the habit of hatred as the opportunity to do constructive work of an important kind.
Source: The Conquest of Happiness, 1930, chap.14:Work
More info.:http://russell-j.com/beginner/HA25-040.HTM