The following quote belongs to the penultimate paragraph of Bertrand Russell’s “Problems of Philosophy”:
The impartiality which, in contemplation, is the unalloyed desire for truth, is the very same quality of mind which, in action, is justice, and in emotion is that universal love which can be given to all, and not only to those who are judged useful or admirable. Thus contemplation enlarges not only the objects of our thoughts, but also the objects of our actions and our affections: it makes us citizens of the universe, not only of one walled city at war with all the rest. In this citizenship of the universe consists man’s true freedom, and his liberation from the thraldom of narrow hopes and fears.
This is one more beautiful example of the point I’ve made over and over again, and that you can find, expressed in different ways, in such varied authors such as Plato, Immanuel Kant, Georg Hegel, Jean Piaget, Charles Peirce, Jean-Pierre Vernant and many others: that there is a fundamental analogy between truth and justice; and that this analogy does not merely consist in a formal similarity between both concepts, but stems from a common, deeper source: the struggle for justice in the realm of the practical affairs of mankind has evolved into the search for truth in the theoretical realm.