A possible concise summary is:
The text is a transcript of a conversation between a master and a disciple about reincarnation. The master explains that reincarnation is a fact, and that everyone has lived many lives in different places and times. He says that the soul can be young or old, depending on its attachments and interests, and that it can incarnate in different forms, even animals. He advises the disciple not to focus on the mental plane or hypnotic regression to know their past lives, but to meditate and feel their inner qualities. He says that the most important thing is to use the potential that one has brought to this life, and to practice spirituality to attain liberation. He also shares his own experiences of remembering his past lives as a Tibetan lama and a European magician, and how he found the unity of all religions in Kriya Yoga.
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