One of the most important basic ideas of Theosophia is that all life is inextricably connected.
A superficial popular translation of this is that we are in contact with all outer life on Earth. However, if we delve deeper into the esoteric traditions from East to West, the logical conclusion follows: on inner planes, the entire Universe is our true home. And under the right cosmic conditions, such as at Midwinter, there are opportunities to experience this independently. We then speak of the Mystic Birth.