The next book in the series is devoted to the theme of man's path on earth, his self-knowledge and life in society, the problem of responsibility and the need for altruism as a panacea for all problems. In her brilliant essays, H. P. Blavatsky recalls the unity of humanity, talks about how the law of karma operates in the life of every day and determines future existence in subsequent reincarnations, about posthumous states and ways to achieve immortality.