V. Man's Communal Life Between Death and a New Birth. Birth into the Physical World.

Thus the peoples have always had a clear consciousness of the fact that what proceeds in the heavens runs parallel with the changes taking place on the earth beneath. When the sun has completed its passage through one constellation, the face of the earth has changed to such an extent that it is profitable for the human being to enter a new life. For this reason the time of reincarnation depends upon the progress of the vernal equinox. The period required by the sun for its passage through one zodiacal constellation is the period within which the human being is twice incarnated, once as a man and once as a woman. The experiences in a male and a female organism are so fundamentally different for spiritual life that the human being incarnates once as a woman and once as a man into the same conditions of the earth. This makes an average of 1,000 to 1,300 years between two incarnations.