The Gospel of Thomas was considered heretical for many centuries. However, modern research presents it in a completely different light: apparently, it contains the original teachings of Jesus of Nazareth and his first disciples more authentically than any other Christian writings. This scientific insight demands bold consequences: we must reconsider our image of the historical Jesus and his first disciples. And we must accept Gnosis and mysticism as the origins of Christianity. In this book, the author presents the Gospel of Thomas in its entirety, interprets it from within itself and from Jewish-Hellenistic traditions, vividly guides through the development of early Christianity, and excitingly portrays the light and shadow of modern research on the subject.