The early twentieth century philosopher and mystic Rudolf Steiner conceived of a theory of human development based upon seven year cycles, and linked those cycles to astrology. The first seven years of life (0-7 years old) were associated with the Moon. During this time, the psychic forces are working to transform the body of the child from one that was inherited from the parents, to one that represents the full personality of the child. The second seven years (7-14 years old) is associated with Mercury. At this time, the child’s imagination and feeling life takes center stage. The third seven years (14-21 years old) is associated with Venus, during which time the higher mind of the adolescent takes root, and the psychic development can be disturbed by the strong impulses of puberty. The next three seven-year segments are associated with the Sun (21-42 years old), and the elements of sentient soul, intellectual soul, and consciousness soul. The next seven-year segment is associated with Mars (42-49 years old), when the soul works hard to impress the full forces of its personality upon the world. At this time, the soul has the opportunity to a higher state of consciousness called Spirit Self. The following seven-year segment is associated with Jupiter (49-56 years old), when wisdom is dawning and the ego needs to unfold the Life Spirit. The final seven-year period is associated with Saturn (56-63 years old) when Saturn completes its second “return” (e.g. comes back to its position it had at one’s birth), and the soul can manifest an event higher element of Self called Spirit Man. For more information, see Steiner’s Karmic Relationships Vol. VII, lecture two.
For more about the stages of life in different traditions, see Thomas Armstrong, The Human Odyssey: Navigating the Twelve Stages of Life (to order from Amazon, click here)