[O]nly if every individual strives for truth can humanity attain a happier future; the atavisms in each of us that stand in the way of a friendlier destiny can only thus be rendered ineffective.
It is not from the benevolence of the butcher, the brewer, or the baker, that we expect our dinner, but from regard to their own interest. We address ourselves, not to their humanity but to their self-love, and never talk to them of our own necessities but of their advantages. Nobody but a beggar chooses to depend chiefly upon the benevolence of his fellow citizens.
We can change society, change humanity by changing ourselves as individuals. By cultivating inner values, we can change our own lives and those of our families. This is how we can create a more peaceful world.
Human freedom is realised in the adoption of humanity as an end in itself, for the one thing that no-one can be compelled to do by another is to adopt a particular end. - 'Metaphysical Principles of Virtue
What can become of him if he is in such bondage to the habit of satisfying the innumerable desires he has created for himself? He is isolated, and what concern has he with the rest of humanity? They have succeeded in accumulating a greater mass of objects, but the joy in the world has grown less.