Tolstoy's perennial philosophy
Union and harmony; and a steady, relentless effort to promote them, which means not only all the work required for supporting one's life, but work also for increasing universal welfare - these are, then, the two final accords in which all the discords, all the storms, which for more than twenty years had raged in the distraught mind of the great artist, all the religious ecstasies and the rationalistic doubts which had agitated his superior intelligence in its insistent search for truth, finally found their solution. On the highest metaphysical heights the striving of every living being for its own welfare, which is Egoism and Love at the same time, because it is Self-Love, and rational Self-Love must embrace all congeners of the same species - this striving for individual welfare by its very nature tends to comprise all that exists.
Russian Literature, by Peter Kropotkin